The lipids of the myocardium, conducting bundle, and valves of beef heart*

Abstract

The lipids of myocardium, conducting bundle, and valves of beef heart were investigated. The atrioventricular valves contained the highest content of total lipid, most of which was triglyceride. The lipids of myocardium and semilunar valves contained the highest amount of phosphatides and cholesterol. The plasmalogens were localized predominantly in the phosphatide fraction of the myocardium and conducting bundle. An analysis of the individual phosphatides showed that with respect to the total lipid phosphorus, the polyglycerolphosphatide was localized in the myocardium and conducting bundle, sphingomyelin occurred in highest amount in the conducting bundle, and lecithin occurred in highest amount in the valves.