[Creatine kinase and lactate dehydrogenase in the early diagnosis of acute myocardial infarct].

The authors investigated in a group of 504 patients--357 men and 147 women with acute myocardial infarction on admission to hospital--the relationship between the ECG finding and values of catalytic concentrations of isoenzymes CK-MB and LD-1 LD-2. They found that isoenzymes CK-MB and LD-1 LD-2 are a more sensitive indicator of acute IM than the ECG tracing. Not even a negative ECG tracing when the total catalytic concentrations of CK and LD are not elevated rules out the possibility of acute myocardial infarction.