Angiotensin-converting enzyme in acute myocardial infarction and angina pectoris

Abstract
Serum activity of angiotensin-converting enzyme was measured by serial analysis in 19 patients with acute myocardial infarction and in eight patients with angina pectoris. As a rule no changes in enzyme activity occurred during 6 days observation. However, two patients with infarction exhibited a pronounced fall of enzyme activity which could not be related to clinical events. The analysis seems to have no place in the diagnosis and management of patients with myocardial infarction.