[Hemodynamic mechanisms of ECG changes in congenital fistulas of the coronary arteries].

ECG changes were analysed in 31 patients with congenital coronary arterial fistulas with reference to the site of coronary arterial lesion and the level and magnitude of blood discharge. Two hemodynamic factors, conditioning ECG changes, were identified as typical for coronary arterial fistulas: 1) volume strain on cardiac compartments making up the fistula receptacle chamber; 2) perfusion deficiency in the distal segment of the affected coronary artery. Fistulas with large-volume shunts may be accompanied by both ischemic changes in the affected-artery basin and regional perfusion disorders in adjacent basins, the latter being due to "stealing" of the adjoining coronary trunk or the type of coronary blood supply.

[Thyroid hormone content of the blood plasma and tolerance for physical loading in ischemic heart disease patients].

Blood thyroid hormones were measured before and after the rationed exercise test in 79 patients with angiographically verified diagnosis of coronary heart disease. A relationship was demonstrated between postexercise blood T3 variation and functional coronary circulation reserve. Hormonal baselines, and exercise-induced blood T4 changes were basically similar in patients with coronary disease of different severity.