[Significance of left ventricular structural changes in arterial hypertension for the prolongation of electric cardiac systole].

Echocardiography was used to examine 93 patients with Stages I and II arterial hypertension with a view to clarifying the impact of structural changes occurring in the left ventricle in the course of the disease on the duration of electric systole. Left ventricular muscle mass was found to become larger with an increase in corrected Q-T interval duration, the upper dependence correlating better with concentric hypertrophy. The duration of electric systole increased with deteriorated left ventricular function. It was empirically concluded that the left ventricular mass index of 200 g was associated with prolonged Q-T interval, which was more than the normal parameters.