The functional characteristics of patients with the silent form of ischemic heart disease

: A total of 124 patients with ischemic heart disease (IHD) were studied. Of these, 53 presented with painless IHD form, 28 patients had atypical pain syndrome. It has been shown that the threshold exercise level both in those persons free from angina pectoris but with postinfarction cardiosclerosis and those with no history of myocardial infarction is not significantly different from and is appreciably higher than in IHD patients with angina pectoris and episodes of "silent ischemia". Informative value has been studied of other diagnostic tests in the above patients: stress-test appeared to be positive in 42.8% of patients, cold test--in 6.3%, hyperventilation test in 16.8% of patients. Painless myocardial infarction (PMI) was detected in 50% of patients with postinfarction cardiosclerosis and 63.6% with no history of myocardial infarction, as evidenced by 24-h ECG monitoring. Analysis of angiogrammes in those persons with atypical pain syndrome showed hemodynamically significant injury to the coronary vessels in 57.1% of patients and a spasm of coronary vessels in 33.3%. PMI occurs in patients with different IHD forms including those with prior MI free from stenocardia.