[Intracardiac hemodynamics in heart rhythm acceleration and the development of an angina attack].

Fifteen patients were examined by echocardiography during the atrial stimulation test. The patients were divided into 2 groups: the main group of 8 patients with ischemic heart disease and a control group of 7 persons wit a negative bicycle ergometry test and no changes in the coronary arteries. It is shown that acceleration of the cardiac rhythm leads to a proportional decrease in the left-ventricular end-diastolic diameter and increase in Vcf and diastolic thickness of the myocardium; the ejection fractions, minute volume and index of left-ventricular activity do not change. It was revealed that the development of myocardial ischemia leads to myocardial asynergy, decrease in the ejection fraction. Vcf, index of left-ventricular activity and minute volume and to an increase in the end-diastolic diameter of the left ventricle, which precede the ECG changes and the development of an angina attack.