I.V. Sokolova

At present, electrocardiography is used to evaluate the myocardium functional state mainly as a characteristic of the bioelectrical side of its activity, whereas the hemodynamic side participates in the diagnostics indirectly, medi-ated by the notions of normality or hypertrophy of the atria and the ventricles. But the heart is not a source of electric energy only. First of all, it is a two-phase biomechanical force and suction pump ensuring blood circulation in the vascular system. The hemodynamic side of the heart performance is the final result since the aim for which the heart is meant and the task which it has to achieve are to ensure required hemodynamic conditions of transcapillary exchange. Therefore, although ECG-signal is purely electrical, it should not be considered separately from pulse hemodynamics. The parameters of the hemodynamic side of myocardium performance suggested from the viewpoint of an "active diastole" theory are in agreement with the elements of ECG morphology. The achieved hemodynamic ECG image of the myocardium functional state is marked by the increase of diagnostic and prognostic capabilities of the signal.