Serum Levels of the Mitochondrial Isoenzyme of Aspartate Aminotransferase in Myocardial Infarction and Muscular Dystrophy

Abstract

Summary. The cationic (mitochondrial) isoenzyme of aspartate aminotransferase is a normal constituent of plasma. After myocardial infarction the serum level usually rises, reaching a peak 24 to 48 h later, and returns to normal more slowly than does the total aspartate aminotransferase activity. The serum level was found to be raised in all 6 cases of muscular dystrophy tested.