BIOELECTRICAL ACTIVITY OF THE HEART IN PA TIENTS WITH ESSENTIAL-HYPERTENSION (HYPERTENSIVE DISEASE) AND WITH ITS COMBINATION WITH ISCHEMIC-HEART-DISEASE

Planimetric analysis of resting and exercise (veloergometer) ECG and e chocardiography were used for the study of relation between bioelectri cal activity of the myocardium and magnitude of its morphological and functional alterations in 16 healthy persons and 65 patients with esse ntial hypertension and various degrees of myocardial hypertrophy inclu ding 15 patients with concomitant ischemic heart disease and NYHA clas s II angina. Ratio of area of ECG waves during depolarization and repo larization to myocardial mass was elevated at early stages of left ven triculaer myocardial hypertrophy and had tendency to progressive decre ase in patients with myocardial mass exceeding 200 g. More pronounced lowering of intensity of myocardial bioelectrical activity was observe d in patients with concomitant ischemic heart disease. There was an in terdependence between bioelectrical activity, parameters of systolic a nd diastolic function, and ectopic activity of the myocardium.