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CHANGE IN CONDITION

The threshold test for compensability is whether the employee is able fully to perform the duties of his pre-injury employment. Celanese Fibers Co. v. Johnson, 229 Va. 117, 120, 326 S.E.2d 687, 690 (1985) (quoting Sky Chefs, Inc. v. Rogers, 222 Va. 800, 805, 284 S.E.2d 605, 607 (1981)).

General principles of workman's compensation law provide that in an application for review of any award on the ground of change in condition, the burden is on the party alleging such change to prove his allegations by a preponderance of the evidence. Great Atl. & Pac. Tea Co. v. Bateman, 4 Va. App. 459, 464, 359 S.E.2d 98, 101 (1987) (quoting Pilot Freight Carriers, Inc. v. Reeves, 1 Va. App. 435, 438-39, 339 S.E.2d 570, 572 (1986)).

An employer alleging a change in condition bears the burden of proving that the claimant is fully able to perform the duties of his pre-injury employment. See Pilot Freight Carriers, Inc. v. Reeves, 1 Va. App. 435, 439, 339 S.E.2d 570, 572 (1986).The employer also must specifically allege the grounds of the change in condition. Only those  issues specifically alleged will be considered. Celanese Fibers Company v. Johnson, 229 Va. 117, 326 S.E.2d 687 (1985). An allegation the employee was able to return to regular employment did not raise the issue whether the current disability was causally related to the original compensable injury. Central Va. Training Center v. Martin, 2 Va. App.188, 342 S.E.2d 652 (1986). An employer must clearly identify the medical report upon which it relies to raise the issue of causation if it does not incorporate the report by reference and attach it to the claim. Suite v. Clinchfield Coal Co., 8 Va. App. 554, 383 S.E.2d 21 (1989), aff'd, 9 Va. App. 492, 389 S.E.2d 187 (1990); Stump Trucking v. Stump, 12 Va. App. 555, 404 S.E.2d 747 (1991).

Pre-existing Condition. The commission did not err in finding that employer had not met its burden of proving a change in condition. Claimant, who had a pre-existing chronic degenerative back condition, suffered an injury to his back. The employer accepted the claim as compensable and agreed to an award of temporary total disability benefits up to a particular date but filed a change in condition application denying disability benefits thereafter. "Causation is an essential element which must be proven by [an employee] in order to receive an award of compensation for an injury by accident under the Virginia Workers' Compensation Act." AMP, Inc. v. Ruebush, 10 Va. App. 270, 274, 391 S.E.2d 879, 881 (1991). After an award adjudicating causation becomes final, "absent [a claim of] fraud or mistake, the doctrine of res judicata bars further litigation of [the issue of causation]." Id. Thus, "[w]here, as here, causal connection between an industrial accident and disability has been established by the entry of an award, an employer has a right to apply for termination of benefits upon an allegation that the effects of the injury have fully dissipated and the disability is the result of another cause." Celanese Fibers Co. v. Johnson, 229 Va. 117, 120, 326 S.E.2d 687, 690 (1985). The employer bears the burden of proving by a preponderance of the evidence the allegations contained in its application for a change in condition. See Pilot Freight Carriers, Inc. v. Reeves, 1 Va. App. 435, 438-39, 339 S.E.2d 570, 572 (1986). Having stipulated to entry of an award for disability resulting from claimant's injury by accident to his back, the employer may not now argue that the same disability was solely the result of a chronic condition that pre-existed the stipulated disability. Causation, once established, is "barred from relitigation on grounds of res judicata." AMP, Inc. v. Ruebush, 10 Va. App. 270, 274, 391 S.E.2d 879, 881 (1991). No medical evidence proved that the effects of claimant's work-related injury by accident have completely dissipated and that claimant's current disability is caused solely by the natural progression of this degenerative spine disease or other non-work related cause. Westmoreland Coal Company v. William Russell, Record No. 0084-99-4 (November 9, 1999). WP Version.

Two Causes Rule vs. More Probable Than Not Rule.   The Workers' Compensation Commission did not err in awarding temporary total disability benefits to claimant upon her change-in-condition application. Claimant had pre-existing knee problems when she injured her right knee in a compensable accident. The pertinent findings and conclusions of claimant's treating physician may be stated as follows: (1) Claimant's 1998 and 1999 surgeries on her right knee resulted in claimant's temporary incapacity to work; (2) the condition of claimant's right knee necessitated the 1998 and 1999 surgeries; and (3) while primarily caused by the pre-existing degenerative knee disease, the condition of claimant's right knee necessitating the 1998 and 1999 surgeries was also caused, to some small degree, by claimant's 1996 compensable work-related injury.
    In proving causation in a workers' compensation case where the evidence demonstrates two or more potential causative factors, one of two conclusions follows. Either, a combination of factors contributed to cause the disability; or, one of the factors caused the disability to the exclusion of the others. The "two causes rule" addresses those cases "where a disability has two causes: one related to the employment and one unrelated."  Under the two causes rule, "full benefits [are] allowed when it is shown that 'the employment is a contributing factor.'"  
    The "more probable than not rule," addresses those cases where only one of a number of possible factors caused the disability.  Under the more probable than not rule, for the disability to be compensable, it must be more probable than not that it was caused by the work-related factor.  That is, a preponderance of evidence must show that work was the cause of the disability.
  Duffy v. Commonwealth/Dep't of State Police, 22 Va. App. 245, 251, 468 S.E.2d 702, 705 (1996) (citations omitted) (alteration in original). 
    Here, the evidence proved that the need for claimant's 1998 and 1999 knee surgeries was caused by two factors: the non-work-related degenerative condition and the compensable 1996 work-related injury.  The extent or degree to which the work-related cause contributed is not important. It matters only that the work-related cause contributed in some part to claimant's disability.  See Ford Motor Co. v. Hunt, 26 Va. App. 231, 237-38, 494 S.E.2d 152, 155 (1997) (applying "two causes" rule even though claimant's treating physician opined that disability was "mainly" caused by non-work-related condition). Thus, under the "two causes" rule, full benefits are allowed for claimant's disability.  Henrico County School Board v. Cathy Mae B. EtterRecord No. 1317-00-2 (September 25, 2001). WP Version.

Code Sec. 65.2-101 defines a "change in condition" as "a change in the physical condition of the employee as well as a change in the conditions under which compensation was awarded, suspended, or terminated which would affect the right to, amount of, or duration of compensation."

New Injury by Accident vs. Change in Condition. This issue may arise in cases where the different statutes of limitations for an injury by accident and change in condition may produce different results and in cases where the insurer at the time of the original injury by accident is different from the insurer at the time when the alleged change in condition arises. A change in condition is a condition flowing from a progression, deterioration or aggravation of the injury sustained in the original accident. A condition or injury resulting from a new and separate accident is not a change in condition. Leonard v. Arnold, 218 Va. 210, 237 S.E.2d 97 (1977).

On April 13, 1995, claimant sustained a compensable lower back injury while working as a process specialist for Amoco Foam Products Company, which was purchased by Tenneco Packaging in 1996. Claimant then settled her claim and the commission approved the settlement. Claimant suffered from intermittent back pain thereafter. On February 11, 1997, she felt lower back pain while trying to push a cart after it had become stuck. Claimant reported that "it was the same thing as before," and  that her old back injury had "flared up on her." Her doctor diagnosed a "[r]e-aggravation of low back strain" and noted that Patrick had suffered from left leg pain in the past as well as back pain. He stated claimant had a recurrence or exacerbation of her pre-existing lower back problems and that this did not constitute a new and separate injury. He believed claimant experienced a re-aggravation of her chronic lumbar strain that had initially occurred on April 13, 1995. He also stated she had "no new mechanism of injury." "In order to carry [the] burden of proving an 'injury by accident,' a claimant must prove that the cause of [the] injury was an identifiable incident or sudden precipitating event and that it resulted in an obvious sudden mechanical or structural change in the body." Morris v. Morris, 238 Va. 578, 589, 385 S.E.2d 858, 865 (1989). "[A]ggravation of an old injury or pre-existing condition is not, per se, tantamount to a new 'injury.' To be a 'new injury,' the incident giving rise to the aggravation must in itself, satisfy each of the requirements for an 'injury by accident arising out of . . . the employment.'" First Federal Savings & Loan Ass'n v. Gryder, 9 Va. App. 60, 63, 383 S.E.2d 755, 757-58 (1989). The evidence proved claimant never fully recovered from the 1995 lower back injury and continued to experience chronic pain and exacerbations of her back condition. Credible medical evidence proved that the February 11 event caused a "[r]e-aggravation of [Patrick's existing] low back strain" that was merely an ever worsening of her original injury. Credible evidence supports the commission's conclusion that claimant's post-February 11, 1997 lower back pain and disability did not result from a new compensable injury by accident. Carolyn J. Patrick v. Tenneco Packaging, Record No. 0201-99-3 (June 15, 1999). WP Version.

When an employee applies for reinstatement of disability benefits based upon a change in condition, the commission must determine: (1) whether a "change in condition" has occurred as defined in Code Sec. 65.2-101, that affects the employee's capacity to work, and (2) if so, whether the change is due to a condition causally connected with the original compensable injury. See King's Market v. Porter, 227 Va. 478, 483, 317 S.E.2d 146, 148 (1984); Central Va. Training Center v. Martin, 2 Va. App.188, 342 S.E.2d 652 (1986)(an employee's claim raises issues of disability and causation. An employer's claim only raises the issue of disability unless other grounds are specifically alleged).

A claimant's proof of the required causal connection must go beyond mere conjecture. Southall v. Eldridge Reams, Inc., 198 Va. 545, 548, 95 S.E.2d 145, 147 (1956)."Possibility is not enough," when proving causation. Eccon Company v. Lucas, 221 Va. 786, 791, 273 S.E.2d 797, 799 (1981); Rust Engineering Co. v. Ramsey, 194 Va. 975, 76 S.E.2d 195 (1953); Wellmore Coal Corporation v. Dallas E. McClanahan, Record No. 1922-98-3 (March 16, 1999). WP Version.

Evidence in the record was sufficient to prove that claimant's 1993 compensable back injury caused the current condition suffered by the claimant. The claimant's symptoms were in the same locations as the symptoms from the original injury, his symptoms persisted to the present, and he remained under the same doctor's treatment since 1993. The commission had awarded the claimant temporary total disability awards through June 16, 1996, thereby establishing the causal relationship at least through that date. There was no evidence of any new specific intervening injury. Although claimant's doctor gave an affirmative response to a question asking whether he agreed that it was just as probable the L5 disc rupture was caused by cumulative or specific events at his new employment as attributable to the 1993 work accident, the doctor also stated, "Patient current complaints are related to 3-29-93 injury." Other notes refer to the new herniation as a "recurrent L5 disc herniation." Wellmore Coal Corporation v. Dallas E. McClanahan, Record No. 1922-98-3 (March 16, 1999). WP Version.

Where an application for a change in condition is filed for the sole purpose of presenting additional evidence in support of a claim that has previously been denied, res judicata will bar reconsideration of the claim. Mize v. Rocky Mount Ready Mix, Inc., 11 Va. App. 601,401 S.E.2d 200 (1991); AMP, Inc. v. Ruebush, 10 Va. App. 270, 391 S.E.2d 879 (1990). However, res judicata does not bar a claim for resumption of benefits when a "change in condition," as contemplated by the Code, has occurred which has not been previously considered by the commission.

Pilot Freight Carriers, Inc. v. Reeves, 1 Va. App. 435, 439, 339 S.E.2d 570, 572 (1986) (the opinion of a treating physician is entitled to great weight) The employer’s burden of proving that the claimant is fully able to perform the duties of his pre-injury employment is met by uncontradicted evidence which establishes that no restrictions have been placed on the claimant's ability to return to work. Mace v. Merchants Delivery Moving & Storage, 221 Va. 401, 403, 270 S.E.2d 717, 719 (1980)(with unequivocal medical evidence that the claimant was fully able to return to unrestricted work and the absence of any evidence to the contrary, the commission could only conclude that the claimant was able to return to work, regardless of the placement of the burden of proof). Where uncontradicted medical evidence does not suggest any physical limitation on a claimant, the employer need not also show that the physician was familiar with the physical requirements of the job and the type of physical limitations which would prohibit its performance. Id. The Fingles Company v. Richard E. Tatterson, Record No. 2882-95-1 (July 9, 1996).

Release to "pre-injury activity" is not necessarily a release to "pre-injury work". The fact that [claimant] was allowed to return to "pre-injury activity" does not necessarily mean that he was capable of performing all the duties of his pre-injury work. Claimant's treating physician did not specifically address work status, and gave no specific opinion that the claimant was able to perform all the duties of his pre-injury work, or that he could work without any limitations or restrictions. Hunan Imperial Restaurant v. Han Trung Lam, Record No. 1990-98-4 (January 26, 1999).

Job descriptions must accurately set forth how claimant actually performed his job. In Clinchfield Coal Co. v. Parrott, 22 Va. App. 443, 470 S.E.2d 597 (1996), the Court of Appeals reaffirmed the principle that "'[i]n determining whether an injured employee can return to his or her pre-injury employment duties the Commission does not look at how the duties could ideally be performed, but rather, how the duties were actually performed.'" 22 Va. App. at 447, 470 S.E.2d at 598-99 (citation omitted). Here, claimant's testimony, which the commission was entitled to accept, established "how the duties were actually performed," or in other words, the "normal and customary manner in which the pre-injury work was performed." Id. at 447, 470 S.E.2d at 599. The employer failed to prove that claimant was able to fully perform his pre-injury work.  Claimant was restricted from even occasionally lifting in excess of 70 pounds, but his job as he actually performed it involved, on occasion, lifting in excess of this amount. Although his doctor released claimant to perform a job set forth in a job description as claimant's regular job, his doctor's release was based upon an incomplete and/or inaccurate job description. Claimant's testimony supported this fact and the fact that the manner in which claimant actually performed his job fell outside of his doctor's restrictions. Harman Mining Corporation v. John Thacker, Record No. 0267-99-4 (June 8, 1999). WP Version.

The claimant presented no evidence to contradict the accuracy of the pre-injury job description offered by the employer, and employer was under no duty to offer additional affirmative evidence as to the accuracy of that job description. After reviewing the job description, three physicians believed claimant could return to his regular job as a salesman of household appliances. The employer met its burden of proving that claimant was released to return to all of the duties of his pre-injury employment. Aiahun Semere v. R.H. Macy & Company, Record No. 0533-99-4 (July 20, 1999). WP Version. 

Where claimant was provided work within his restrictions placed on him by his doctor, but chose to exceed his doctor's restrictions, a resulting aggravation of his compensable injury is not compensable. Kent A. Derrow v. Owens Brockway Plastics, Inc., Record No. 1827-98-3 (January 19, 1999).

Where an employee did not file a timely application or demonstrate any disability during the two-year period following the industrial accident, that employee could not be awarded compensation for total disability which occurred more than two years after the injury by accident. Mayberry v. Alcoa Building Products, 18 Va. App. 18, 20, 441 S.E.2d 349, 350 (1994) Compensation for work incapacity is not awardable for the first seven calendar days of incapacity resulting from an injury unless certain exceptions are met. See Code Sec. 65.2-509. Claimant must prove that he sustained more than seven days of work incapacity during the two-year period immediately following his accident. Thurondie L. Chisholm  v.  The Washington Post, Record No. 0786-98-4 (August 25, 1998).

Code Sec. 65.2-708(A) provides that "[n]o such review [of an award on the ground of change in condition] shall be made after twenty-four months from the last day for which compensation was paid, pursuant to an award under this title . . . ." This section requires that claimant's application alleging a change in condition be filed within twenty-four months from the last day for which compensation was paid pursuant to an award.

Employer bore the burden of proving, on its change-in-condition application, that claimant's ongoing pain and related disability are not causally related to her compensable injury. Employer failed to meet its burden. Claimant had a diagnosis of fibromyalgia prior to her compensable injury, and claimant's treating physician opined that her pre-existing fibromyalgia played a greater role in her inability to return to full-duty employment than did her mechanical back problem. However, a rheumatologist believed that claimant's mechanical back problem was responsible for her pain and that "the back problem is fanning the fibromyalgia." On October 9, 1997, the treating physician reported that "it's not really clear what the source of [claimant's chronic pain problem] is; that is, it could be related to her chronic myofascial pain; it may be related to scar tissue in her back or just a chronic muscular problem." On November 6, 1997, however, less than a month later, and without further examining claimant, and without articulating any basis for a different opinion, the treating physician opined that claimant's pain was not related to her accident of September 7, 1994, but that her chronic pain problem stemmed from the pre-existing fibromyalgia. Although the opinion of the treating physician is entitled to great weight, see Pilot Freight Carriers v. Reeves, 1 Va. App. 435, 439, 339 S.E.2d 570, 572 (1986), "[m]edical evidence is not necessarily conclusive, but is subject to the commission's consideration and weighing." Hungerford Mechanical Corp. v. Hobson, 11 Va. App. 675, 677, 401 S.E.2d 213, 214 (1991). Given the absence of any further examination of the claimant or an additional report supporting the treating physician's change of opinion, the commission was free to reject the treating physician's opinion as to causation. Once the commission rejected this opinion, no evidence in the record proved that claimant's ongoing disability was not causally related to her compensable injury. Additionally, a neurologist was unable to conclude that claimant's ongoing pain was caused solely by her pre-existing fibromyalgia. The neurologist's testing resulted in objective findings which implicated sources for claimant's ongoing pain other than, or in addition to, claimant's fibromyalgia. Mary Washington Hospital v. Patricia B. Holloway, Record No. 1582-98-2 (March 30, 1999). WP Version.

In 1993, claimant sustained compensable injuries to his neck, back, and left shoulder while employed as a bartender-manager for employer and an award for temporary total disability was entered.. Claimant suffered from chronic active hepatitis C and chronic obstructive pulmonary disease that placed additional stress on his neck muscles. By 1996 his doctor believed that, "if he were in fact disabled from gainful employment, it would be on the basis of his underlying medical conditions and not due to any permanent residual from his alleged fall." An FCE caused the doctor to further note that it was "difficult to determine to what extent his [unrelated] medical conditions [were] affecting his lifting capacities." In reviewing the FCE, the doctor concluded that at a minimum, claimant could perform sedentary light work. Limiting her analysis solely to claimant's work-related injury, the doctor believed that claimants "work-related cervical thoracic strain injury [was] permanent and stable." According to the doctor, claimant's condition had stabilized and his functional disability rated a "6% whole person impairment." She concluded, based on her assessment of The Dictionary of Occupational Titles, that claimant could perform a bartending job with certain limitations. He could not lift more than fifteen pounds occasionally, and he could not perform repetitive or sustained overhead activities. The doctor also opined that claimant's unrelated medical conditions would actually preclude him from returning to any gainful employment. When an employer alleges a change in condition warranting termination of an award, the burden is on the employer to prove the allegations by a preponderance of the evidence. See Pilot Freight Carriers, Inc. v. Reeves, 1 Va. App. 435, 438-39, 339 S.E.2d 570, 572 (1986). The commission properly found that employer failed to meet this burden. The doctor opined that the compensable injury alone, prohibited claimant from regularly lifting more than fifteen pounds and from performing regular overhead tasks. The definition of disability is "whether the employee is able fully to perform the duties of his pre-injury employment." Celanese Fibers v. Johnson, 229 Va. 117, 120, 326 S.E.2d 687, 690 (1985). Employer did not provide a pre-injury job description. At most the evidence established claimant could perform a bartender's job with limitations, i.e. not "fully," as a result of his compensable injury. Therefore, the evidence was insufficient for the commission to conclude and for the Court of Appeals to hold as a matter of law that, given the physical limitations arising from claimant's compensable injury, he could return to his pre-injury employment. Liz's Blue Diamond, Inc. v. Joseph E. Rico, Record No. 1943-98-1 (June 1, 1999). WP Version.

"General principles of workman's compensation law provide that '[i]n an application for review of any award on the ground of change in condition, the burden is on the party alleging such change to prove his allegations by a preponderance of the evidence.'" Great Atl. & Pac. Tea Co. v. Bateman, 4 Va. App. 459, 464, 359 S.E.2d 98, 101 (1987) (quoting Pilot Freight Carriers, Inc. v. Reeves, 1 Va. App. 435, 438-39, 339 S.E.2d 570, 572 (1986)).Claimant's treating physician, without explanation, changed claimant's diagnosis from that of a strain to degenerative disc disease and bulging disc upon the sudden onset of renewed symptoms. A specialist found no causal connection between claimant's symptoms and her compensable accident. The commission was entitled to find that because of his specialty and because the onset and duration of the symptoms is uncontradicted, the specialist's opinion was more persuasive than that of the treating physician. In view of the long gaps between symptoms and treatment following the accident, and the specialist's expertise, claimant has not met her burden of proving a change in condition causally connected to her compensable accident. "Medical evidence is not necessarily conclusive, but is subject to the commission's consideration and weighing." Hungerford Mechanical Corp. v. Hobson, 11 Va. App. 675, 677, 401 S.E.2d 213, 215 (1991). Linda Dixon v. Woodtech, Inc., Record No. 0459-99-3 (September 7, 1999).WP Version.

Claimant's treating neurosurgeon, who began treating claimant in July 1997 and twice performed surgery on claimant's back, opined that it was "more likely than not" that claimant's L4-5 disc herniation was caused either directly by the June 23, 1997 injury by accident or constituted "a natural progression or deterioration" of the condition caused by that injury by accident.  Another neurosurgeon, who examined claimant and reviewed his diagnostic studies upon referral from the treating neurosurgeon, opined that claimant's need for surgery to repair his L4-5 disc defect was related to the June 23, 1997 injury. An employer’s expert only examined claimant three times.  Another doctor did not examine claimant at all and merely reviewed his medical records. Based upon these medical opinions and the medical records, the commission did not err in concluding that claimant proved a causal relationship between the L4-5 disc herniation and his compensable June 23, 1997 injury by accident.  Where medical evidence conflicts and the treating physician is positive in his or her diagnosis, then his or her opinion will generally be afforded greater weight by the courts. See Pilot Freight Carriers, Inc. v. Reeves, 1 Va. App. 435, 439, 339 S.E.2d 570, 572 (1986). Although claimant, just before his October 1997 myelogram CT, felt a sharp pain when he rolled from his back to his left side while on his couch at home, the medical records, which documented claimant's  ongoing and continuous back pain before October 1997, and the opinions of the treating neurosurgeon and the doctor to whom claimant was referred by the treating neurosurgeon  constitute credible evidence to support the commission's finding that the sharp pain claimant felt in October 1997 was merely a part of the ongoing symptoms he had experienced since the June 23, 1997 accident and did not constitute a new injury. New River Castings Company v. James Maple, Record No. 1552-99-3 (November 16, 1999). WP Version.

The Commission did not err in finding that claimant's compensable back injury rather than her unrelated knee injury continued to disable her from returning to her pre-injury employment and in finding the opinions of employer's medical experts did not constitute sufficient evidence to prove that claimant was capable of performing her pre-injury employment as a courier. Claimant's treating physician and another doctor examined claimant completely and were actively involved in claimant's treatment contrary to the employer's physicians. The claimant's doctors concluded claimant's compensable injury prohibited her from returning to her pre-injury job. Federal Express Corporation v. Connie T. Klyver, Record No. 1947-99-2 (December 21, 1999). WP Version.

The Workers' Compensation Commission (commission) did not err in finding that employer failed to prove that claimant was able to return to her pre-injury work as of September 30, 1998. Claimant's doctor acknowledged that the claimant's pain complaint is what prevented her from being able to return to her pre-injury work as a bus driver. Although her doctor admitted that she relied upon the claimant's statements as to what she could or could not do, her doctor opined that the claimant's complaints are real, based upon the doctor's own observations regarding the pain. Her doctor stated that she did not rely only upon the claimant's statements in deciding work capacity, but based that assessment on her own observations from having taken care of the claimant over an extended period. The doctor opined that claimant's pain complaints were causally related to the work accident, and that claimant had not yet reached maximum medical improvement. Claimant's doctor also noted that in November 1998, the claimant attempted unsuccessfully to return to work as a bus driver. Claimant's doctor believed that the claimant was presently capable of light-duty work, and opined that claimant is not a malingerer. In its role as fact finder, the commission was entitled to weigh the medical evidence. The commission did so and articulated legitimate reasons for accepting the opinions of the claimant's treating neurologist, while rejecting the contrary opinions of independent medical examiner. Washington Metropolitan Area Transit v. Cooper, Record No. 2337-99-4 (February 8, 2000). WP Version.

The commission erroneously found that claimant established a change in condition warranting TPD for the period claimed and erroneously found a causal connection between her claimed disability and the compensable injury she sustained to her lower back and left knee on May 16, 1996. In an earlier proceeding claimant stipulated that that the disability she experienced during the period from November 6, 1996 through February 3, 1997 was not causally connected to her accident of May 16, 1996. Claimant then filed a second claim in which she alleged a change in condition, and requested ongoing TTD for a period beginning on March 27, 1997 and continuing indefinitely. King's Market v. Porter, 227 Va. 478, 483, 317 S.E.2d 146, 148 (1984), controls the determination of whether claimant’s claim qualifies under Code Sec. 65.2-101(4) as a "change in condition" sufficient to warrant a resumption of disability benefits. See Hercules, Inc. v. Carter, 13 Va. App. 219, 223, 409 S.E.2d 637, 639-40 (1991). When an employee files an application for reinstatement of disability benefits, two questions arise:  1) has there been a change in the employee's capacity to work; 2) if so, is the change due to a condition causally connected with the injury originally compensated. Claimant’s change in benefit status clearly fails the first prong of the test.  The only change she has asserted is that she "went from a period of not receiving workers' compensation to a change in that condition, as she sought temporary total disability beginning March 27, 1997."  Such a change in benefit status has no bearing upon the claimant's capacity to work. Furthermore, claimant's disability failed to satisfy the second prong of the King's Market test.  Nothing in claimant’s medical records after the date of the hearing on the first claim demonstrates a "change due to a condition causally connected with the injury" for which she originally sought compensation. King's Market, 227 Va. at 483, 317 S.E.2d at 148.  Indeed, Dr. Brickhouse outlined the history of claimant’s treatment with him in a letter to the commission, dated May 8, 1997, and confirmed that as of the date of the letter claimant continued to experience back and knee pain which he attributed to 1) degenerative disc and joint disease of the lumbar spine, and 2) mild degenerative changes in her knees.  Dr. Brickhouse also stated in a note dated June 17, 1997, that claimant complained of continued knee pain, and he reported that she had not returned to work since November, 1996, because of her knee and back problems.  Claimant's statements, reported by Dr. Brickhouse, demonstrate that her disability following March 27, 1997 was the same as that which she experienced in the period from November, 1996 through February 2, 1997, which, by stipulation, she conceded was not causally connected to her industrial accident.  Her condition therefore remained unchanged from the first period to the second. Finally, Terry's claim of disability in the second proceeding is barred by the doctrine of res judicata.  See Rusty's Welding Service, Inc. v. Gibson, 29 Va. App. 119, 128, 510 S.E.2d 255, 259 (1999) (en banc) (res judicata applies to decisions of the commission); Allegheny Airlines, Inc. v. Merillat, 14 Va. App. 341, 343-44, 416 S.E.2d 467, 469 (1992) (where claims relate to different periods of time and the claim in the second proceeding is supported by different evidence than was offered in the first proceeding, res judicata does not apply). Although claimant’s second claim relates to a different period of time than that claimed in the first proceeding, the medical evidence she offered in the second proceeding was identical to that offered in the first proceeding, viz. the May 8, 1997 letter from Dr. Brickhouse.  Her claim is thus barred by res judicata.  See Merillat, 14 Va. App. at 343-44, 416 S.E.2d at 469. Aramark Corp. v. Virginia I. Terry, Record No. 0921-99-2 (March 14, 2000). WP Version.  

The commission did not err in finding that the Fund failed to carry its burden of proof in its change in condition application alleging that the claimant was no longer disabled from the industrial accident and that his residual disability was unrelated to the accident. Dr. Mitchener's evidence did not persuade the commission that claimant’s residual incapacity, specifically the lack of grip strength in the right hand, was unrelated to the industrial accident.  Dr. Mitchener opined that claimant’s lack of grip strength was unrelated to the industrial accident and that it probably was caused by "peripheral nerve irritation and/or compression, etiology unknown."  The commission, however, was not required to accept Dr. Mitchener's conclusory opinion as to causation, nor was the commission required to conclude from Dr. Mitchener's opinion that because the etiology of the nerve irritation or degeneration was unknown, that the Fund had met its burden of proving that the disability was not caused by the industrial accident.  Because Dr. Mitchener recommended referral to a neurologist to determine the cause of claimant’s peripheral neuropathy in his right arm, the commission would not presume that the condition, which had not existed prior to the burn injury, was not related to the burn injury.  Quite simply, the commission found that the Fund's evidence, which consisted of little more than one doctor's opinion that the cause of claimant’s nerve irritation or degeneration was unknown, was not convincing, and therefore, not sufficient to persuade it that claimant’s residual disability was unrelated to the burns and skin grafts that this twenty-year-old laborer had suffered. Uninsured Employer's Fund v. Tony Allen Nichols, Record No. 1338-99-3 (March 14, 2000). WP Version.   

The Workers' Compensation Commission did not err in denying claimant's application alleging a change-in-condition in his June 5, 1994 injury by accident. Claimant's condition had deteriorated due to psychological dysfunction, but the medical evidence included opinions that claimant was able to return to his pre-injury employment without restrictions with respect to claimant's physical condition, and that claimant's behavior was consistent with malingering. John Charles Harriger v. Pepsi-Cola General Bottler, Record No. 0290-00-3 (June 6, 2000). WP Version

Claimant worked as a rigger for the employer when he suffered a compensable injury to his back on January 23, 1993. Claimant's September 27, 1994 claim letter satisfied the two-year filing requirement. It advised the commission that he suffered an injury to his back while working for the employer on January 23, 1993 and stated a claim "for all benefits to which he is or may be entitled" under the Workers' Compensation Act. Claimant, however, did not request a hearing date until June 3, 1997.  It does not matter that a hearing on the claim did not occur in the two-year period. So long as the claimant's notice advises the commission of necessary elements of his claim, "'it activates the right of the employee to compensation and . . . invokes the jurisdiction of the Industrial Commission.'" Trammel Crow Co. v. Redmond, 12 Va. App. 610, 614, 405 S.E.2d 632, 634 (1991) (attorney's letter to commission, which contains required information, satisfied filing requirement) (quoting Shawley v. Shea-Ball Constr. Co., 216 Va. 442, 446, 219 S.E.2d 849, 852 (1975)). The employee is also not required during the two-year period to prove  his disability . Cf. Southwest Virginia Tire, Inc. v. Bryant, 31 Va. App. 655, 661, 525 S.E.2d 563, 566 (2000) (in change in condition application, claimant not required to produce evidence prior to expiration of two years). Instead, the employee's claim must allege a present and existing disability within two years of the accident, and he must prove that disability to receive benefits. Compare Johnson v. Smith, 16 Va. App. 167, 170, 428 S.E.2d 508, 510 (1993) (commission's denial of benefits reversed where claimant proved disability existed during statute of limitations period), and WLR Foods, Inc. v. Cardosa, 26 Va. App. 220, 229, 494 S.E.2d 147, 151 (1997) (benefits denied because disability did not commence until two years after accident). The fact that the employee did not seek a hearing within two years of the accident does not bar his claim. Nor does the fact that claimant received benefits under the Longshore Act trigger the time limits for filing a change in condition application under Sec. 65.2-708.  In this case, claimant had not received benefits under the Virginia Workers' Compensation Act.  Sec. 65.2-708 requires a change in condition request to be filed within two years of an award of benefits under the Act. See Mayberry v. Alcoa Bldg. Prods., 18 Va. App. 18, 21, 441 S.E.2d 349, 350-51 (1994) (absent entry of formal award there is nothing to review). An award under the LHWCA, however, is not an award under the Workers' Compensation Act. See Virginia Int'l Terminals v. Moore, 22 Va. App. 396, 402, 470 S.E.2d 574, 577 (1996), aff'd, 254 Va. 46, 486 S.E.2d 528 (1997). Sec. 65.2-708 is inapplicable because there was no prior award under the Act to review.  Finally, claimant, still disabled from pre-injury work, is also entitled to benefits although his plant shut down when a contract was lost. "[T]he employer is relieved of its duty to compensate the claimant only if it offers the claimant employment in his or her 'pre-injury capacity' and the claimant has been released to perform the work." Carr, 25 Va. App. at 312, 487 S.E.2d at 881 (disabled employee who accepted selective employment but suffered wage loss because there was no opportunity for overtime is still entitled to benefits). "The employer's financial condition . . . do[es] not affect the claimant's right to compensation due to an impaired capacity to perform his pre-injury duties." Consolidated Stores Corp. v. Graham, 25 Va. App. 133, 137, 486 S.E.2d 576, 578 (1997). After an economic layoff from selective employment, an employee remains entitled to benefits until he either fully recovers and is released to pre-injury work, or until the employer offers him other selective employment. See Washington Metropolitan Transit Authority v. Harrison, 228 Va. 598, 600, 324 S.E.2d 654, 655 (1985) (benefits denied because employee failed to prove he marketed his residual work capacity). The employer's reasons for the layoff should not diminish the employee's entitlement to benefits. The employee was injured on the job and his capacity to work reduced. The Workers' Compensation Act "is highly remedial and should be liberally construed to advance its purpose . . . [of compensating employees] for accidental injuries resulting from the hazards of the employment." See Henderson v. Central Tel. Co., 233 Va. 377, 382, 355 S.E.2d 596, 599 (1987) (citations omitted). Until the employee can perform at his pre-injury capacity, he is protected from the economic vicissitudes of the market place. The employee's layoff due to the employer's economic downturn does not preclude his entitlement to disability benefits. Metro Machine Corporation v. Isaac L. Lamb, Record No. 3044-99-2 (August 15, 2000). WP Version

The commission did not err by 1) finding that a de facto award of benefits existed between March 20 and September 14, 1996; and 2) holding that claimant's January 13, 1998 supplemental change in condition application related back to her May 14, 1997 application. Pursuant to the decision in National Linen Service v. McGuinn, 5 Va. App. 265, 362 S.E.2d 187 (1987) (en banc), the commission had the authority to determine that a de facto award of benefits existed. Additionally, the County's procedural due process rights were not violated when the commission ruled that claimant's January 13 filing related back to her May 14 application.
    Claimant sustained a compensable injury to her back and leg on January 7, 1993. On July 21, 1995, the commission entered an award approving the memorandum of agreement filed by the County providing for payment of temporary total benefits to Taylor through May 14, 1995.  Taylor returned to work, but the County terminated her employment on March 19, 1996, after she was unable to perform her pre-injury duties. The County then voluntarily paid Taylor the equivalent of her temporary total disability award from March 20 through September 14, 1996The County unilaterally ceased making payments to Taylor effective September 15, 1996.  On May 14, 1997, claimant notified the commission of the County's voluntary payments to her. She also requested "ongoing temporary partial compensation benefits."  Two days prior to her January 15, 1998 hearing before the deputy commissioner, Taylor notified the commission that, while she was seeking temporary partial disability benefits beginning September 26, 1996, she would be seeking temporary total disability benefits effective on or about October 4, 1996 and continuing to the present.
    In McGuinn, the court addressed the consequences of an employer's failure to submit a memorandum of agreement to the commission where the employer voluntarily paid disability benefits to the claimant. After the claimant injured his ankle at work, the employer voluntarily paid him total disability benefits for a period of thirteen months. The employer did not, however, submit a memorandum of agreement to the commission. After the employer ceased paying benefits, the claimant filed an application for hearing seeking continued benefits. The employer defended on the ground that the claimant had failed to market his residual capacity. See McGuinn, 5 Va. App. at 267-68, 362 S.E.2d at 188. In allocating the burden of proof, the court noted that, had the employer filed the memorandum of agreement with the commission, the employer would have shouldered the burden of proving that the claimant was not entitled benefits. The court concluded that Code Sections 65.1-45 and 65.1-93 required the employer to submit a memorandum of agreement to the commission when it voluntarily decided to compensate the claimant for his injuries. See McGuinn, 5 Va. App. at 270, 362 S.E.2d at 189-90. The court further held that a de facto award of disability benefits arose when the employer paid the claimant benefits for thirteen months without filing the memorandum of agreement with the commission. See id. at 269-70, 362 S.E.2d at 189. The holding in McGuinn does not just relate to initial claims for benefits.  Whether an agreement between the parties pertains to an initial award or a supplemental award following a change of condition, the employer is still obligated to file a memorandum of agreement with the commission. Code Sec. 65.2-701 refers to agreements reached "after injury" and does not expressly state or imply that the employer's obligation to file memoranda of agreement is limited to the initial award. See Commission Rule 4 ("All agreements as to payment of compensation shall be reduced to writing by the employer and promptly filed with the Commission." Code Sec. 65.2-708 does not require a claimant to file an application for change of condition if she can reach a satisfactory agreement with her employer regarding her entitlement to continuing disability benefits. Claimant was not required to file a change of condition application in March 1996 because the County voluntarily paid the equivalent of temporary total disability benefits to her. Having evidently conceded that claimant was entitled to these benefits, it was the County's responsibility to file a supplemental memorandum of agreement with the commission.
    A finding of a de facto award does not depend upon a showing of fraud or concealment.
See McGuinn, 5 Va. App. at 269-70, 362 S.E.2d at 189. As the court explained in Ryan's Family Steak Houses, Inc. v. Gowan, 32 Va. App. 459, 528 S.E.2d 720 (2000), where the employer has stipulated to the compensability of the claim, has made payments to the employee for some significant period of time without filing a memorandum of agreement, and fails to contest the compensability of the injury, it is "reasonable to infer that the parties ha[ve] reached an agreement as to the payment of compensation," and a de facto award will be recognized. Id. at 463, 528 S.E.2d at 722 (quoting McGuinn, 5 Va. App. at 269-70, 362 S.E.2d at 189). Therefore, that the presence of fraud or concealment by the employer is not a requisite precondition for determining that a de facto award should be recognized.
   
The commission did not err when it held the 1998 filing related back to 1997 for purposes of calculating the ninety-day period of Rule 1:2(B). two days prior to the hearing before the deputy commissioner, claimant formally declared she would be claiming entitlement to temporary total disability benefits during much of the period of time she had previously indicated she was entitled to partial disability benefits. The correspondence authored by counsel for the County in July and September 1997 reflects the County knew claimant would be attempting to prove entitlement to total disability benefits. In its January 14, 1998 letter to the commission, the County neither objected to the deputy considering the January 13 filing nor sought a continuance to review the medical records. The County merely requested that the record be held open for it to gather additional evidence pertaining to claimant's claimed total disability. Finally, the amendment did not seek any benefits outside of the time period identified in the 1997 application. Cf. WLR Foods, Inc. v. Cardosa, 26 Va. App. 220, 227, 494 S.E.2d 147, 151 (1997). "Consolidation of claims at the hearing is permissible and in accordance with due process, provided the 'employer had notice of the time, location and subject matter of the proceeding which was reasonably calculated to afford the employer an opportunity to be heard.'" Crystal Oil Co., Inc. v. Dotson, 12 Va. App. 1014, 1017, 408 S.E.2d 252, 253 (1991) (quoting Sergio's Pizza v. Soncini, 1 Va. App. 370, 373, 339 S.E.2d 204, 205 (1986).  Where the commission permits the consolidation of claims with little or no advance notice, the dispositive issue is whether the employer suffered prejudice. Id. at 1018, 408 S.E.2d at 253-54. In Crystal Oil, the employer challenged the commission's ruling that permitted an amendment to the claimant's change of condition application and permitted the amendment to relate back to the date of that application. On October 26, 1989, the claimant filed a change in condition application seeking partial disability benefits effective September 11, 1989. At the hearing before the deputy commissioner, the claimant sought to amend his application by claiming total disability benefits from July 25 through September 10, 1989. See id. at 1015-16, 408 S.E.2d at 252-53. the employer had defended the application with significant success. See id. at 1018-19, 408 S.E.2d at 254. The court also found that the employer had been given advance notice of some of the claimant's contentions from prior proceedings. See id. at 1019, 408 S.E.2d at 254. But see WLR Foods, 26 Va. App. at 227, 494 S.E.2d at 151 (holding that, where the change of condition application sought benefits effective February 1, 1996, and where the commission, sua sponte and without notice to the employer awarded benefits predating February 1, the employer was prejudiced). County of Henrico Public Utilities v. Susan Taylor, Record No. 1214-00-2 (January 23, 2001). WP Version.

    The evidence did not support the finding that claimant's psychiatric treatment was causally related to his work injury. "If the expert medical witnesses cannot testify that it is at least more probable than not that the disease arose out of and in the course of employment, compensation must and should be denied, not because the law requires more of medicine than it can produce, but because the law requires more than simply proof that the disease 'might' have been caused by a particular result." Westmoreland Coal Co. v. Campbell, 7 Va. App. 217, 224, 372 S.E.2d 411, 416 (1988).
      In their concluding opinions, both doctors indicated they needed additional medical history before rendering an opinion on the relation of the psychiatric condition to the injury. The commission erred in finding the medical evidence credible when it lacked a sufficient base. Clinchfield Coal Co. v. Bowman, 229 Va. 249, 252, 329 S.E.2d 15, 16 (1985), held the commission erred in attributing weight to medical evidence based upon a faulty premise. The Court reversed the commission's finding that the doctor was credible because the doctor's opinion was based on erroneous information supplied by the claimant. "In Dr. McIlwain's first report, he assumed that the condition he discovered resulted from the 1978 accident. The basis for this assumption was the incomplete information furnished by Bowman." Id. at 251-52, 329 S.E.2d at 16 (emphasis in original). "Whenever a physician's diagnosis flows from an assumption that rests upon a faulty premise, such as misinformation provided by a claimant, the commission may refuse, and often will be required to refuse, to attribute any weight to that opinion." Sneed v. Morengo, Inc., 19 Va. App. 199, 205, 450 S.E.2d 167, 171 (1994) (citation omitted). The doctors' reports were insufficient to establish a causal connection between the employee's work injury and his psychiatric condition beyond mere conjecture. Howell Metal Company v. Michael B. Adams, Record No. 1992-00-3 (March 27, 2001). WP Version.

    The Workers' Compensation Commission did not err in awarding benefits to claimant for aggravation of an earlier compensable knee injury. On August 14, 1998, while working at the Central Virginia Training Center, claimant injured her left knee when she caught a falling patient. See was diagnosed with a symptomatic plica, chondromalacia of the patella, a lateral patellofemoral compression syndrome and a medial meniscal tear. On September 28, 1998 she was released to regular work. Claimant stated that her knee was much better at that time and denied any giving way or buckling. Nevertheless, she continued to experience some discomfort. Her last medical treatment for that injury was in December, 1998 or January, 1999.
    On October 21, 1999, claimant's knee popped and buckled as she carried a mop and bucket up a stairway. She fell to the floor. She went to the emergency room and returned to her initial physician's care. She described the pain as different from the pain she had experienced in August, 1998. Although it was in the same location, it was more severe, and she was unable to walk. Her soctor diagnosed left knee patellofemoral chondromalacia and bilateral patellofemoral compression syndrome. He reported that "[the] event that she describes from October 21, 1999 did cause an aggravation of her previous left knee injury. It was not a new diagnosis, but it was a new event." On December 21, 1999, he returned claimant to medium work with restrictions.
    On January 12, 2000, after the employer denied her benefits, claimant stopped treating with her first doctori. She began seeing a new doctor, whom she chose from a panel of physicians furnished by the employer. Her new doctor agreed with her first doctor's diagnosis. On April 6, 2000, he placed claimant on restricted duty.
    An MRI revealed a torn medial meniscus and the absence of an anterior cruciate ligament. Her new doctor concluded that arthroscopic surgery would be appropriate, but actual reconstruction would not be necessary. Claimant was removed from work from May 4, 2000 to May 25, 2000. A second opinion was requested by the employer, and claimant was examined by Dr. John A. Cardea on June 16, 2000. Dr. Cardea agreed with her new doctor's diagnosis. He reported that claimant's "medial meniscus problem [relates] to the initial injury. . . . [T]his is an exacerbation of a pre-existing condition or it may even be the first symptoms of a pre-existing condition."
    Following the October 21, 1999 injury, claimant filed for temporary total disability benefits, claiming (1) that she had suffered a compensable change in condition of the August 14, 1998 injury; or, in the alternative (2) that she had suffered a new compensable injury on October 21, 1999.  
    When an employee files a change of condition application seeking reinstatement of disability benefits, two questions arise: (1) has there been a change in the employee's capacity to work; [and] (2) if so, is the change due to a condition causally connected with the injury originally compensated. King's Market v. Porter, 227 Va. 478, 483, 317 S.E.2d 146, 148 (1984). Unquestionably, her capacity to work changed as a result of the October, 1999 injury. On April 6, 2000, she was placed on restricted work duty, and was removed from work duty for the period of May 4 to May 25, 2000. The issue is whether this disability was causally connected to her original compensable injury.
    When a primary injury . . . is shown to have arisen out of the course of employment, every natural consequence that flows from the injury is compensable if it is a direct and natural result of a primary injury. Leonard v. Arnold, 218 Va. 210, 214, 237 S.E.2d 97, 99 (1977). Credible evidence supports the commission's finding that claimant's disability following the October, 1999 injury was a natural consequence flowing from her compensable August, 1998 injury. Claimant had no knee problems prior to the August, 1998 accident. Following the completion of treatment for that injury, she continued to have pain in her knee when climbing stairs or when standing for long periods. Her first doctor stated unequivocally that the October, 1999 incident was an aggravation of her original injury. An independent medical examiner selected by the employer, wrote that her pain flared when she returned to full duty work and that "this is an exacerbation of a pre-existing condition or it may even be the first symptoms of a pre-existing condition." These facts viewed as a whole support the determination that the October, 1999 incident was an aggravation of her 1998 injury.  CW/Central VA Training Center v. Dorothy M. Cordle, Record No. 0458-01-2 (December 12, 2001) WP Version.

The Workers' Compensation Commission did not err in ruling that claimant's change-in-condition claim for temporary total disability benefits beginning November 25, 1999 is not barred by the doctrine of res judicata.
    In 1997 claimant suffered a compensable injury by accident to her ankle, leg, and back, a herniated disc, left L5-S1. On July 30, 1999, clamant filed a change-in-condition claim, alleging temporary total disability and alleging that her disability was caused by a right L5-S1 disc herniation resulting from her compensable accident.  The Commission denied this claim.
    On February 14, 2000, claimant filed another change-in-condition claim, alleging temporary total disability from November 24, 1999 resulting from severe degenerative changes at L5-S1 that require surgery and that are related to her compensable injury by accident.
    In a proper case "principles of res judicata apply to Commission decisions." K&L Trucking Co. v. Thurber, 1 Va. App. 213, 219, 337 S.E.2d 299, 302 (1985). Where applicable, the principle "bars relitigation of the same cause of action, or any part thereof which could have been litigated between the same parties and their privies." Id. "One who asserts the defense of res judicata has the burden of proving by a preponderance of the evidence that an issue was previously raised and decided by [the commission] in a prior cause of action." Fodi's v. Rutherford, 26 Va. App. 446, 449, 495 S.E.2d 503, 505 (1998). A cause of action is instituted by a change-in-condition claim. Whitten v. Mead Paperboard, 4 Va. App. 182, 186, 355 S.E.2d 349, 350 (1987).
    Where an application for a change in condition is filed for the sole purpose of presenting additional evidence in support of a claim that has previously been denied, res judicata will bar reconsideration of the claim. However, res judicata does not bar a claim for resumption of benefits when a "change in condition," as contemplated by the Code, has occurred which has not been previously considered by the commission. Fodi's, 26 Va. App. at 448-49, 495 S.E.2d at 504 (citations omitted).
    The current change-in-condition claim was based on the existence of a severe degenerative change at the L5-S1, which the commission found to be the result of Clem's compensable injury by accident. The commission's ruling that the evidence proved a causal connection between the degenerative changes and the original injury by accident is unchallenged. The only issue to be resolved under Lowes' defense of res judicata is whether the current change-in-condition claim, which relies upon a degenerative change at L5-S1 that is related to the original compensable injury by accident, "has . . . been previously considered by the commission." Id. at 449, 495 S.E.2d at 504.
    The evidence concerning the first change-in-condition claim established that the right-sided herniated disc was a "new" injury, which was unrelated to the original compensable injury by accident. The evidence concerning the second change-in-condition claim established that the degenerative changes at L5-S1 resulted from the injury by accident. No evidence from either proceeding established that the two claims, i.e., the right-sided disc herniation and the degenerative changes, were inextricably linked. "The barring of a cause of action 'which could have been litigated' is not directed to an unrelated claim which might permissibly have been joined, but, to a claim which, if tried separately, would constitute claim-splitting." Bates v. Devers, 214 Va. 667, 670-71 n.4, 202 S.E.2d 917, 920 n.4 (1974). Because the commission's decision on the first change-in-condition claim was a final determination only on the merits of the issue whether the right-sided disc herniation resulted from the original injury by accident, the doctrine of res judicata does not bar the current change-in-condition claim where the cause of action is based upon whether degenerative changes in the L5-S1 were caused by the original injury by accident. In short, the current claim was not raised by the first change-in-condition claim and was not addressed by the medical evidence then before the commission.
Lowes of Christiansburg v. Jennifer D. Clem, Record No. 1188-01-3 (January 15, 2002). WP Version.

Claimant did not establish a causal connection between his 1995 accident and his later cervical problems.  To receive an award, a claimant must prove his change of condition is causally related to the original occupational injury.  Commonwealth/Cent. Virginia Training Ctr. v. Cordle, 37 Va. App. 232, 237, 556 S.E.2d 64, 67 (2001).  Claimant argues the accident exacerbated his pre-existing condition, not that the December 1995 accident directly caused the condition.  Aggravation of a pre-existing condition is compensable under the Workers' Compensation Act.  Manassas Ice & Fuel Co. v. Farrar, 13 Va. App. 227, 231-32, 409 S.E.2d 824, 827 (1991).  The treating physician, Dr. Geckle, provided the only testimony in support of his position that the accident aggravated his cervical condition.  Dr. Geckle's only statement regarding  causation was an "X" beside "Yes," in response to the written question, "In your opinion . . . did your patient's accident of December 13, 1995 and/or its sequellae aggravate, accelerate, and/or exacerbate your patient's cervical problems . . . ."  Nothing in his medical reports provides any support for this conclusionWhile a treating physician's opinion normally is given great weight, see Pilot Freight Carriers, Inc. v. Reeves, 1 Va. App. 435, 439, 339 S.E.2d 570, 572 (1986), such an opinion is not conclusive, especially when the opinion is not accompanied by any reasoning or explanation.  Cf. Lanning v. Virginia Dep't of Transp., 37 Va. App. 701, 708-09, 561 S.E.2d 33, 36-37 (2002) (explaining that a "bald assertion" is not enough to prove causation nor are "talismanic words" necessary).  Here, while the doctor used the "talismanic words," he provided no explanation for his conclusion.  On the other hand, Dr. Bhuller, who also treated claimant, Dr. Green, and Dr. Hagan, all agreed the cervical condition was not related to the 1995 accident.  While they did not explicitly address the issue of aggravation, they completely rejected any causal link between the injury and the accident.  While the medical opinions conflicted, the commission was free to decide which evidence was more credible and should be weighed more heavily.  See McPeek v. P. W. & W. Coal Co., Inc., 210 Va. 185, 188, 169 S.E.2d 443, 445 (1969); Georgia-Pacific Corp. v. Robinson, 32 Va. App. 1, 5, 526 S.E.2d 267, 269 (2000).   The commission did not abuse its discretion when it declined to believe claimant's physician.  The commission did not err in finding his claim failed to establish a causal connection between his original, compensated injury and his new injury.  Kenneth P. Thompson v. Brenco, Inc., Record No. 0206-02-2 (August 13, 2002). WP Version.

    The commission did not err in ruling that the aggravation of claimant's compensable injury to his hand was compensable because employer gave claimant work that required him to exceed his work restrictions, even though claimant willfully violated his work restrictions by performing that work.
     Claimant, who worked for employer as a painter, suffered a compensable injury to his left thumb on June 9, 2000, while lifting a piece of scaffolding.  He went to Patient First on June 12, 2000, where he was examined by Dr. G. Clifford Walton.  Dr. Walton diagnosed a finger sprain.  He limited claimant to light-duty work with no lifting with the left hand.  When claimant returned for a follow-up examination on June 19, 2000, Dr. Walton took him out of work and referred him to Dr. Keith A. Glowacki, a hand specialist. 
      Dr. Glowacki examined claimant on June 20, 2000.  He diagnosed a left thumb radial collateral ligament tear and placed claimant's left hand in a cast.  Dr. Glowacki noted in his report that claimant would "have no use of that hand at work" for three to four weeks.  He further estimated in a patient work status report dated June 20, 2000, that claimant would not have full use of his left hand for six weeks and indicated in the "work limitations" portion of that report that claimant was to have "no use of injured hand."  Dr. Glowacki emphasized in the "comments" section of that report that claimant was to have "[a]bsolutely no use whatsoever of [left] hand!"
        Employer, although notified of claimant's restrictions, sent claimant to an airport work site, where claimant was given the job of painting baseboards on the outside of a building.  The nature of the airport job required him to repeatedly lift a gallon of paint with his left hand. Claimant's assignment at the airport job lasted two days.  then sent claimant to a work site at an apartment complex.  Terry testified he again told claimant's supervisor to let claimant do only low work.  Initially, claimant was given the job of painting several seven-foot-tall windows.  When the windows were completed, claimant's supervisor had him paint a deck, which required him to lift and climb a sixteen-foot ladder. Claimant testified he was unable to lift and climb the ladder and paint the deck without using his left hand.  Claimant further stated that, when he climbed the ladder, he had to temporarily remove a brace that had been prescribed by Dr. Glowacki for his left hand, because he was afraid he would fall off the ladder if he did not.  Claimant also testified his supervisor saw him lift and climb the ladder using his left hand and remove his brace, but the supervisor did not tell claimant not to use his left hand.  According to claimant, his supervisor told him he had to lift the ladder.  Claimant did not ask anyone to help him.  He complained to a co-worker that the work he was being given violated the work
restrictions imposed by his doctor.
    When claimant returned for a follow-up visit on August 18, 2000, Dr. Glowacki reported as follows: Despite conservative treatment, [claimant] is failing with continued use of his hand at work given the option of only two-handed type of work.  It is impossible without use of your thumb to do heavy lifting of a ladder. . . .  Presently he is a danger to himself and his coworkers if he continues to lift ladders, climb ladders and do heavier type activity. Unfortunately I believe all this is moot as he is failing conservative treatment and likely is made worse by using his hand.  I told him that we'll have to get an MRI to evaluate this area and probably have to perform surgery at this point. . . .  We will see him back after the MRI regarding the surgical treatment.
    Dr. Glowacki further noted in a patient work status report dated August 18, 2000, that claimant's injury was work related and that he did not know when claimant might return to work with full use of both hands.  Dr. Glowacki also indicated in the "work limitations" portion of that report that claimant was to have "no use of injured hand" and added in the "comments" section that surgery would probably be necessary "due to [claimant's] constant using of hand."
    Claimant continued working for employer through September 21, 2000, doing such work as painting offices with eight-foot-high ceilings, the outside of condominiums, the outside of a shed, the outside of houses, and the outside of a church.  According to claimant, his work included carrying forty-foot ladders and climbing ladders to the second floor of houses.  Claimant left employer in September to work for another painting company because he "did not feel good" and employer did not give him his normal hours due to his hurt hand.  In his new job, as a supervisor, he did not lift or climb ladders or otherwise use his left hand when painting.  He left that job three months later because his thumb and the cold weather were "bothering [him] too much."
    To prevail on his claim, claimant had to prove by a preponderance of the evidence that the disability for which he sought compensation was causally related to his June 9, 2000 compensable injury.  See King's Market v. Porter, 227 Va. 478, 483, 317 S.E.2d 146, 148 (1984); Rosello v. K-Mart Corp., 15 Va. App. 333, 335, 423 S.E.2d 214, 216 (1992).  The commission's determination of causation is a finding of fact.  American Filtrona Co. v. Hanford, 16 Va. App. 159, 165, 428 S.E.2d 511, 515 (1993).  "If there is evidence, or reasonable inferences can be drawn from the evidence, to support the commission's findings, they will not be disturbed on review, even though there is evidence in the record to support a contrary finding."  Morris v. Badger Powhatan/Figgie Int'l, Inc., 3 Va. App. 276, 279, 348 S.E.2d 876, 877 (1986).
    It is well settled in Virginia that an employee is entitled to receive compensation for the subsequent aggravation of a compensable injury if that aggravation is directly connected to the employee's original compensable injury by a chain of causation uninterrupted by "'an independent intervening cause attributable to [the employee's] own intentional conduct.'" Leadbetter, Inc. v. Penkalski, 21 Va. App. 427, 432, 464 S.E.2d 554, 556 (1995) (quoting 1 Arthur Larson, The Law of Workmen's Compensation Sec. 13.00 (1994)).  On the record of this case, claimant's performance of work that required him to exceed his work restrictions did not constitute an "independent" intervening causeEmployer knew the work it was giving claimant required him to exceed his work restrictions, and employer should have reasonably known that such work would predictably result in the aggravation of claimant's original compensable injury.  Accordingly, claimant's conduct did not break the chain of causation directly connecting his compensable injury and the continuing aggravation of that injury.
    The continuing aggravation of claimant's original compensable injury was a result employer "should have reasonably expected."  It was the predictable consequence of employer's giving claimant work beyond his work restrictions.  Thus, having knowingly given claimant work that required him to exceed his work restrictions and that could reasonably be anticipated to result in the aggravation of claimant's compensable injury, employer may not escape having to pay for claimant's compensation benefits for an aggravation caused by such work simply by blaming claimant for engaging in work beyond his restrictions.  Employer must bear the responsibility of having knowingly given claimant work that required him to exceed his doctor's work restrictions. S. P. Terry Company, Inc. v. Jorge RubinosRecord No. 2470-01-2 (August 13, 2002). WP Version.

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