[The diagnostic and prognostic assessment of the changes in lysosomal enzymatic activity in the blood of patients with acute myocardial infarct and unstable stenocardia].

Serum activity of five lysosomal marker enzymes was measured in patients with acute myocardial infarction (AMI) and unstable angina pectoris (UAP) with consideration of the disease severity. A significant increase of enzyme activity was found both in patients with UAP and AMI on the first day of hospitalization. The enzymes activity was higher in patients with more severe form of AMI. Lysosomal enzyme activity was closely related to severity of the disease: clinical improvement occurred in patients with decreased activity (on day 7-10), while in aggravation of the disease lysosomal hyperenzymemia stayed high up to the end of the observation period (on day 30). The above findings demonstrate feasibility of using lysosomal enzymes test both for differentiation between AMI and UAP and for predicting the disease recurrences.