[Effect of acute hypothermia on the lipid composition of the myocardial mitochondria of warm-blooded animals].

In dogs and albino rats, artificial drop of body temperature by 8--10 degrees C elicits change of phospholipid spectre and increases amount of unsaturated fatty acids in lipids of the myocardium mitochondria. Drop of the temperature by 18--20 degrees C decreased amount of polyen fatty acids in dogs but caused no changes in the high amount of unsaturated lipids in rats. Role of of these facts in mitochondrial functions during hypothermia and possible dependence of the animals resistance against low temperature of the degree of membrane lipids reorganization, are discussed.