[Newly developed stenocardia: various clinical characteristics of its stable and unstable course].

A total of 130 anginal patients were examined within 3 months after the onset of anginal attacks. Angina was stable (SA) in 100 patients and unstable (UA) in 30. There were no differences between SA and UA patients in terms of the degree and spread of coronary arterial stenoses. Signs of coronary arterial spasm were detected in 27 (20.8%) of 130 patients, being more frequent in UA (53%), as compared to SA (11%; p less than 0.001). Acute myocardial ischemia produced groups of ventricular extrasystoles more frequently than it did isolated extrasystoles in patients with recent angina (78.6% vs. 16.7%; p less than 0.001). Groups of ventricular extrasystoles were recorded more frequently in UA patients, as compared to SA ones (23.3% vs. 7%; p less than 0.05).