Objectives: Describe the course of fulminant liver failure after exert
ional heat stroke. Case report: A 30-year-old man acclimated to the tr
opical climate, collapsed and became comatose with hyperthermia during
a commando march in Gabon. Thirty-six hours later, the biological exa
mination revealed moderate rhabdomyolysis and fulminant liver failure,
An orthotoptic liver transplantation was performed at the 48th hour,
Acute renal failure with severe rhabdomyolysis developed on the 4th da
y post-surgery while the patient was perfectly alert. His condition th
ereafter deteriorated and he died of chronic rejection 11 months after
liver transplantation. Discussion: In its most serious forms exertion
al heat stroke is a multiple organ dysfunction syndrome of poorly unde
rstood pathogenesis. The reported case suggests that exertional heat s
troke can cause fulminant liver failure, resulting either from the dir
ect effect of heat on the hepatic parenchyma, or from acute hepatic is
chemia due to blood redistribution made worse by the hypersecretion of
antidiuretic hormone, a potent portal vasoconstrictor, which occurs i
n the heat acclimated subject.