title: [ECG changes during a stenocardia attack caused by physical loading].
abstract: ECG was examined during anginal attacks caused by dosaged bicycle tests in 200 patients with chronic coronary insufficiency of varying degree. In 79.5% of the patients the anginal attack was accompanied by ECG changes. The ECG changes preceeded the appearance of anginal attack precursors. Half of the patients, mainly those with infrequent attacks of retrosternal pains recurring not daily, and only under extreme physical exercises, could continue the test for 2 min. and longer despite the appearance of transitory ECG changes, and do on with it until the development of anginal attack precursors. Proper attention to this fact seems to be of importance for the evaluation of the reserve of coronary circulation in patients with chronic coronary insufficiency.
mesh_terms: D000328:Adult; D000368:Aged; D000787:Angina Pectoris / Q000503:physiopathology*; D002908:Chronic Disease; D002986:Clinical Trials as Topic; D003327:Coronary Disease / Q000503:physiopathology; D004562:Electrocardiography; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013997:Time Factors
vernacular_title: Izmeneniia EKG vo vremia pristupa stenokardii, vyzvannogo fizicheskoĭ nagruzkoĭ