SUPREME COURT OF MISSOURI

en banc 

RONALD MALAM,

)

Appellant, )

)

vs. ) No. SC95170

)

STATE OF MISSOURI, )

DEPARTMENT OF CORRECTIONS, )

)

Respondent. )

APPEAL OF A DECISION OF THE LABOR AND INDUSTRIAL 

RELATIONS COMMISSION

Opinion issued June 28, 2016

Ronald Malam appeals a Labor and Industrial Relations Commission 

(commission) decision denying his claim for workers’ compensation benefits. The 

commission determined that Mr. Malam was involved in a workplace accident but 

concluded that he did not bear his burden of proving that the accident was the 

“prevailing factor” causing his medical condition or disability. The commission’s 

decision is reversed, and the case is remanded.

Facts

Mr. Malam was employed by the Missouri Department of Corrections 

(employer) as a corrections officer. While at work, Mr. Malam executed a 

“takedown” on an uncooperative inmate. Mr. Malam initially experienced only an 

adrenaline rush. As he escorted the inmate to his housing unit, Mr. Malam 
2

became short of breath and began spitting up blood. Mr. Malam was taken by 

ambulance to the hospital where he experienced a “hypertensive crisis” and was 

unconscious for a week. 

Mr. Malam’s treating physicians were aware of the takedown but noted no 

external signs of injury on Mr. Malam except a bruised knee. Dr. Timothy Woods 

stated that it was “likely that trauma precipitated the medical processes [Mr. 

Malam] has going on.” Dr. Douglas Ham stated that it was “unclear whether this 

was all related to a possible cardiac contusion tipping [Mr. Malam] into the 

congestive heart failure or whether he could have also had pulmonary contusion 

which worsened his respiratory and cardiac status or could have been secondary to 

the stress of the altercation.” Ultimately, Mr. Malam underwent a heart 

catheterization, and the doctors diagnosed him with a hypertensive crisis. 

Mr. Malam filed a claim for workers’ compensation seeking reimbursement 

from employer in the amount of $138,010.15 for medical expenses. At a hearing 

before an administrative law judge (ALJ), the parties introduced expert medical 

opinions from two doctors. Dr. Anne-Marie Puricelli examined Mr. Malam on 

behalf of his employer. Dr. Puricelli concluded that the prevailing factors causing 

Mr. Malam’s hypertensive crisis were his preexisting health problems. 

Mr. Malam’s medical expert, Dr. Brent Koprivica, concluded that the takedown 

was “the direct, proximate and prevailing factor precipitating [Mr. Malam’s] 

hypertensive crisis.” The ALJ found that, “[b]ased on the opinion of 
3

Dr. Puricelli,” the takedown did not meet the prevailing factor requirement and 

that the hypertensive crisis was not related to any work event. 

Mr. Malam appealed the ALJ decision to the commission. The 

commission determined that Mr. Malam suffered an accident but that Mr. Malam 

was not entitled to benefits because he had not proven that the accident was the 

prevailing factor causing his medical condition or disability. The commission 

found Dr. Puricelli “did not have the correct facts” and, therefore, disagreed with 

her conclusion that Mr. Malam’s pre-existing health problems were the prevailing 

factors causing his hypertensive crisis. Specifically, the commission noted that 

Dr. Puricelli’s opinion was based on the erroneous assumption that Mr. Malam 

had not fallen to the ground during the takedown and speculation that Mr. Malam 

had received inadequate medical care for his pre-existing hypertension. 

The commission determined that Dr. Koprivica’s opinion was insufficient 

to establish causation because he referred to the takedown as both a “precipitating” 

and a “prevailing factor” in Mr. Malam’s hypertensive crisis. The commission 

agreed that “an accident may be both a precipitating and the prevailing factor 

causing a compensable injury” but concluded that “this does not appear to be 

Dr. Koprivica’s opinion in this case.” The commission concluded that even if 

Dr. Koprivica’s opinion were credible, Mr. Malam failed to establish that the 

accident was the prevailing factor in his injury because “absent further explanation 

as to what Dr. Koprivica meant by choosing those specific words, we simply are 
4

unable to conclude that Mr. Malam has proven the requisite degree of causation to 

satisfy the requirements of the statute.” 

Mr. Malam raises two points on appeal. First, he asserts that the 

commission erred in finding that he failed to meet his burden of proving that his 

accident was the prevailing factor causing his hypertensive crisis because 

Dr. Koprivica’s testimony established that the takedown was the prevailing factor. 

Alternatively, Mr. Malam asserts that the commission erred by focusing on the 

hypertensive crisis as the sole injury while ignoring other injuries that, in turn, 

“caused the need to treat the hypertensive crisis.” 

Standard of Review

A reviewing court may modify, reverse, remand for rehearing, or set aside a 

workers’ compensation award upon a finding that: (1) the commission acted 

without or in excess of its powers; (2) the award was procured by fraud; (3) the 

commission’s factual findings do not support the award; or (4) there was not 

sufficient competent evidence in the record to warrant the making of the award. 

Section 287.495.11

 “Whether the award is supported by competent and substantial 

evidence is judged by examining the evidence in the context of the whole record.” 

Hampton v. Big Boy Steel Erection, 121 S.W.3d 220, 223 (Mo. banc 2003).

Questions of law are reviewed de novo. Pierce v. BSC, Inc., 207 S.W.3d 

619, 621 (Mo. banc 2006). This Court must defer to the commission’s findings on 

 1 All statutory references are to RSMo 2000 as updated through the 2010 Supplement.

 
5

issues of fact, the credibility of the witnesses, and the weight given to conflicting 

evidence. Treasurer of State-Custodian of Second Injury Fund v. Witte, 414 

S.W.3d 455, 460 (Mo. banc 2013). The determination of whether an accident is 

the “prevailing factor” causing a claimant’s condition is an inherently factual one. 

Maness v. City of De Soto, 421 S.W.3d 532, 539 (Mo. App. 2014). Although the 

commission’s decision is afforded substantial deference, this Court must still 

“examine the whole record to determine if it contains sufficient competent and 

substantial evidence to support the award, i.e., whether the award is contrary to the 

overwhelming weight of the evidence.” Hampton, 121 S.W.3d at 222-23.

Analysis

To obtain workers’ compensation benefits, Mr. Malam had to prove that he 

was involved in an “accident” that was the “prevailing factor” causing an injury 

that arose out of and in the course of employment. Section 287.020.2 provides:

The word “accident” as used in this chapter shall mean an 

unexpected traumatic event or unusual strain identifiable by 

time and place of occurrence and producing at the time 

objective symptoms of an injury caused by a specific event 

during a single work shift. An injury is not compensable 

because work was a triggering or precipitating factor.

Section 287.020.3(1) provides that “[a]n injury by accident is compensable only if 

the accident was the prevailing factor in causing both the resulting medical 

condition and disability.” A “prevailing factor” is “the primary factor, in relation 

to any other factor, causing both the resulting medical condition and disability.” 

Id. 
6

The dispositive issue in this case is whether Mr. Malam proved by 

substantial and competent evidence that his workplace accident was the prevailing 

factor causing his subsequent hypertensive crisis. “Medical causation, which

is not within common knowledge or experience, must be established by scientific 

or medical evidence showing the relationship between the complained of condition 

and the asserted cause." Gordon v. City of Ellisville, 268 S.W.3d 454, 461 (Mo. 

App. 2008). Ascertaining whether Mr. Malam’s workplace accident caused him 

to suffer a hypertensive crisis requires expert medical testimony. The dissenting 

opinion notes evidence of Mr. Malam’s “complex” medical history, but the fact 

remains that the precise, dispositive issue of causation was resolved by the 

commission’s assessment of the testimony of Dr. Puricelli and Dr. Koprivica. As 

noted, the commission disputed Dr. Puricelli’s conclusion because it was based on 

inaccurate facts. By discarding Dr. Puricelli’s testimony, the commission was left 

with Mr. Malam’s expert, Dr. Koprivica. The commission found that 

Dr. Koprivica did not testify unequivocally that Mr. Malam’s workplace accident 

was the prevailing factor because he testified that the accident was the “prevailing 

factor precipitating” the hypertensive crisis. 

While “[t]his Court defers to the Commission’s factual findings and 

recognizes that it is the Commission’s function to determine credibility of 

witnesses,” Hornbeck v. Spectra Painting, Inc., 370 S.W.3d 624, 629 (Mo. banc 

2012), this is not a case in which the commission made a credibility determination 

as to competing medical experts. Instead, this case involves an overly technical 
7

and parsed analysis of Dr. Koprivica’s testimony that overlooks the plain meaning 

of what he said. As Missouri courts have recognized, “[T]he words a medical 

expert uses . . . are often important, not so much in and of themselves, but as a 

reflection of what impression such witness wishes to impart.” Mayfield v. Brown 

Shoe Co., 941 S.W.2d 31, 36 (Mo. App. 1997). 

The commission determined that Mr. Malam failed to sustain his burden of 

proof because Dr. Koprivica’s testimony was equivocal. Dr. Koprivica’s 

testimony was not equivocal. At no point did Dr. Koprivica state that 

Mr. Malam’s accident was merely a “precipitating factor” in relation to another 

“prevailing factor.” Rather, Dr. Koprivica emphasized the role of Mr. Malam’s 

accident while minimizing the role of his preexisting conditions: “Clearly, 

Mr. Malam had an underlying hypertensive cardiomyopathy identified as far back 

as 2005. Nevertheless, the prevailing factor[s] precipitating the specific event 

were the unexpected emotional and physical stresses associated with restraining 

the offender.” Read in context, the plain meaning of Dr. Koprivica’s testimony 

was that the accident was the prevailing factor causing or, in his words, 

“precipitating” Mr. Malam’s hypertensive crisis. The commission’s decision to 
8

deny worker’s compensation benefits to Mr. Malam is reversed, and the case is 

remanded.

_________________________________ 

Richard B. Teitelman, Judge

Breckenridge, C.J., Stith and Draper,

JJ., concur; Russell, J., dissents in 

separate opinion filed; Fischer and

Wilson, JJ., concur in opinion of 

Russell, J.
SUPREME COURT OF MISSOURI

en banc

RONALD MALAM, )

)

Appellant, )

)

v. ) No. SC95170

)

STATE OF MISSOURI, )

DEPARTMENT OF CORRECTIONS, )

)

Respondent. )

DISSENTING OPINION

I respectfully dissent. The majority opinion neglects to apply the correct standard 

of review in reaching its decision to reverse the Labor and Industrial Relations

Commission (commission). The correct standard of review is whether there was 

sufficient competent and substantial evidence to support the commission’s finding that 

Ronald Malam failed to show his workplace accident was the “prevailing factor” that 

caused his medical condition. In light of the medical evidence offered here, the 

commission’s decision should be affirmed. 
2

I. Standard of Review

On appeal, the reviewing court defers to the commission on factual findings,

credibility determinations, and weight given to conflicting evidence. Treasurer of StateCustodian of Second Injury Fund v. Witte, 414 S.W.3d 455, 460 (Mo. banc 2013). If an 

award is supported by sufficient competent and substantial evidence upon the whole 

record and is not contrary to the overwhelming weight of the evidence, it must be upheld. 

Hampton v. Big Boy Steel Erection, 121 S.W.3d 220, 222-23 (Mo. banc 2003). 

II. Analysis

A claimant’s burden of proof to show eligibility for workers’ compensation 

benefits has changed in recent years. Prior to 2005, a claimant needed to show only that 

work was “a substantial factor” in causing the complained-of injury. Section 287.020.3, 

RSMo 2000. The General Assembly, however, amended this statute in 2005 by placing a 

heightened burden on a claimant, requiring a showing that the accident was the 

“prevailing factor” in causing the individual’s injury. Section 287.020.3.1

 To be the 

“prevailing factor,” the accident must be “the primary factor, in relation to any other 

factor, causing both the resulting medical condition and disability.” Id. An injury is “not 

compensable because work was a triggering or precipitating factor.”2

 Section 287.020.2

(emphasis added). The commission’s determination of whether a workplace accident is 

the “prevailing factor” in causing a claimant’s medical condition is a factual one that is 

 1 All statutory references are to RSMo Supp. 2010 unless otherwise indicated.

2 This language was added to section 287.020.2 in 1993. RSMo Supp. 1993. 
3

entitled to deference by reviewing courts. Maness v. City of De Soto, 421 S.W.3d 532, 

539 (Mo. App. 2014). 

Although the majority opinion correctly states these well-settled rules, it proceeds

to analyze the commission’s decision in this case without applying the appropriate

standard of review. The majority opinion fails to find that the commission’s award is not 

supported by sufficient competent and substantial evidence or that it is contrary to the 

overwhelming weight of the evidence. Instead, the majority opinion dismisses the 

commission’s decision as an “overly technical and parsed analysis” of an expert’s written 

opinion and concludes that “the plain meaning of Dr. Koprivica’s testimony was that the 

accident was the ‘prevailing’ factor causing or, in his words, ‘precipitating’ Mr. Malam’s 

hypertensive crisis.” Slip. op. 6-7.

The correct inquiry here is whether the commission’s award is supported by 

sufficient competent and substantial evidence. In light of Malam’s medical history and 

the testimony from the various physicians, that question should be answered 

affirmatively. 

Dr. Koprivica concluded in his written report that Malam’s workplace accident 

was the “direct, proximate and prevailing factor precipitating his hypertensive crisis.” 

(emphasis added). Dr. Koprivica stated elsewhere that “[c]learly, Mr. Malam had an 

underlying hypertensive cardiomyopathy identified as far back as 2005. Nevertheless, 

the prevailing factor precipitating the specific event” was the workplace accident. 

(emphasis added). These statements are problematic because section 287.020 has long 
4

held that an injury is not compensable because a work accident was a precipitating factor. 

In addition, the “prevailing factor” standard has been the law since 2005.

Here, Dr. Koprivica provided expert testimony to establish medical causation. 

Because the commission concluded that Dr. Koprivica’s testimony was equivocal with 

regard to whether the accident was the “prevailing factor” causing Malam’s medical 

condition, it found that Malam failed to establish the requisite degree of medical 

causation. This finding is supported by sufficient competent and substantial evidence and 

is not contrary to the overwhelming weight of the evidence. 

While a medical expert does not have to employ particular legal terms of art in 

rendering an opinion, see Mayfield v. Brown Shoe Co., 941 S.W.2d 31, 36 (Mo. App. 

1997), it appears that Dr. Koprivica has had extensive experience with the Missouri

workers’ compensation system for almost 20 years, and he was well aware of the

statutory directive that “an injury is not compensable because work was a triggering or 

precipitating factor” and that a work accident must be the “prevailing factor” causing the 

injury. Section 287.020; see, e.g., Dierks v. Kraft Foods, 471 S.W.3d 726, 732 (Mo. 

App. 2015) (Dr. Koprivica testified that an employee’s workplace fall was the “prevailing 

factor” in causing permanent injury to her knee); Watson-Spargo v. Treasurer of State, 

Custodian of Second Injury Fund, 370 S.W.3d 292, 299 (Mo. App. 2012) (Dr. Koprivica 

stated that an employee’s accident was the “prevailing factor” in causing her additional 

disability); Tillotson v. St. Joseph Med. Ctr., 347 S.W.3d 511, 515 (Mo. App. 2011) (Dr. 

Koprivica concluded that an employee’s workplace injury was the “prevailing factor” in 

causing her need for a knee replacement).
5

Further, Dr. Koprivica’s experience as a medical expert in the area of workers’ 

compensation is vast. He has given expert opinions in 33 published workers’ 

compensation cases, according to a Westlaw search. His curriculum vitae indicates that 

he has spoken about the workers’ compensation laws of this state. Because Dr. Koprivica 

is a frequent expert witness, the commission was familiar with his expertise in workers’ 

compensation law and could expect his written medical opinion in this case to reflect that 

knowledge.

Additionally, Malam’s medical history and testimony from treating physicians

supported the commission’s conclusion that Malam did not show that the accident was 

the “prevailing factor” in causing his hypertensive crisis. As Dr. Koprivica noted,

Malam’s medical history is “complex.” Six years before his accident, Malam was 

hospitalized and diagnosed with congestive heart failure, hypertension, primary 

cardiomyopathy, pulmonary hypertension, left ventricular dysfunction, biventricular 

failure, and morbid obesity. He was hospitalized a second time for acute gallstone 

pancreatitis and at that time was diagnosed with diabetes. Malam was hospitalized once 

more the year preceding his accident with severe acute pancreatitis, acute renal failure, 

obesity, hypertension, and uncontrolled diabetes. 

Reports from Dr. Timothy Woods, Dr. Douglas Ham, and Dr. Mark Anderson, the 

physicians who treated Malam after the accident, reflected that there was significant 

confusion among these physicians regarding the events of the accident. They all

indicated in their reports that a person had fallen on Malam’s chest, which was not the 

case. Because Malam was intubated, the physicians were not able to ask him what 
6

actually occurred. Nevertheless, none of the treating doctors found any sign of trauma to 

Malam’s chest. Dr. Woods observed that Malam’s knee was abraded but “[n]o other 

external trauma [was] noted.” Dr. Woods concluded that “[i]t does not appear that the 

patient’s disease process is related to trauma. It is likely that trauma precipitated the 

medical processes he has going on.” (emphasis added). 

Dr. Ham similarly reported that Malam had a small abrasion on one knee but that 

there was no bruising on his chest. He concluded that Malam was “[a] 50-year-old male 

with significant congestive heart failure, pulmonary edema[:] [i]t is unclear whether this 

was all related to a possible cardiac contusion tipping him into the congestive heart 

failure or whether he could have also had a pulmonary contusion which worsened his 

respiratory and cardiac status or could have been secondary to the stress of the 

altercation.” Dr. Ham found no traumatic injuries on Malam. 

Dr. Anderson conducted a CT scan of Malam’s chest and reported no “rib fracture 

or evidence of pulmonary contusion.” Dr. Anderson stated that Malam suffered from 

hypertensive crisis, acute renal failure, and respiratory failure.

Prior to the accident, Malam suffered from hypertension, cardiomyopathy, and 

diabetes. Upon Malam’s discharge from the hospital after the accident, in addition to 

those pre-existing conditions, he also was diagnosed with methicillin-sensitive 

staphylococcus aureas (MSSA) bronchitis and hypertensive emergency. 

In addition to Malam’s medical history and the reports of treating physicians, the 

commission also had before it the reports of two consulting physicians who saw Malam

after the accident and reviewed his medical records. The opinions of Dr. Koprivica are 
7

discussed above. Dr. Anne-Marie Puricelli concluded that Malam had a history of 

hypertensive crises with flash pulmonary edema that was cardiogenic in origin, 

congestive heart failure, and renal failure and that none of these conditions were related 

to the Malam’s workplace accident. 3

 

III. Conclusion

Malam did not meet his burden of proof that the accident was the prevailing factor 

causing his medical conditions. It was undisputed that Malam suffered from serious preexisting medical conditions prior to the accident, including hypertension, 

cardiomyopathy, and diabetes. The physicians who treated Malam after the accident 

found no signs of trauma to Malam’s chest, and their reports demonstrate uncertainty 

about the underlying cause of Malam’s hypertensive crisis. Dr. Puricelli concluded that 

Malam’s workplace accident was unrelated to his medical conditions. Most importantly, 

Dr. Koprivica, who was an experienced expert witness, did not unequivocally state that 

Malam met that standard. Section 287.020. At the time of the hearing, the law in this 

area had been the same for almost a decade. Since 2005, section 287.020 has required a 

showing that the accident was the “prevailing factor” causing a claimant’s medical 

condition. And even before that, in 1993, the legislature specifically prohibited

compensation when a claimant could only show that work was a precipitating or 

 3 The commission noted that both of the consulting experts based their opinions on 

certain facts that were not consistent with the record. Dr. Koprivica reported that Malam

used “extreme exertion” in “wrestling” the other individual to the ground during the

altercation, but Malam testified that the force he used was “minimal.” The report of 

Dr. Puricelli indicated a belief that Malam remained standing during the entire 

altercation, which was not the case. 
8

triggering factor. As an experienced expert in workers’ compensation cases, 

Dr. Koprivica presumably knew this important distinction between the words 

“prevailing” and “precipitating.” Consequently, Malam did not meet the required burden 

of proof.

There was sufficient substantial and competent evidence in this record to support 

the commission’s finding that Malam did not show the requisite degree of medical 

causation to award workers’ compensation benefits. 

I would affirm the commission’s decision. 

______________________________

Mary R. Russell, Judge