[Dependence of myocardium function on the degree of coronary bed involvement in chronic ischemic heart disease patients with and without previous myocardial infarct].

A total of 104 patients with chronic ischaemic heart disease were examined. The left ventricle myocardial function was studied by determining the signs of overload of the atria by the method of enhanced atrial vectorcardiography, which were compared to the data of heart catheterization, and of left ventriculography. This showed the reliability of the non-invasive methods of investigation. The degree of lesions of the coronary bed was determined in the bicycle ergometric tests and by selective coronarography. A group of patients who had not suffered myocardial infarction showed trends of progressing signs of myocardial insufficiency corresponding to the degree of the damage of the coronary bed. In a group of patients, who had suffered myocardial infarction, myocardial insufficiency was more manifest, however, even in them the degree of myocardial lesion was closely associated not only with the presence of the scar changes but also with the degree of the damage of the coronary bed.