[Outcomes of reoperations in dysfunction of mechanical prostheses in relation to the clinical course].

Operations were conducted for the second time on 87 patients (98 operations). Reoperations were performed on 75 (76.5%) and closure of the fistula in 23 (23.

[Evaluation of late results of aortocoronary bypass in patients with ischemic heart disease in relation to the bypass function].

The authors analyse 82 patients with aggravation of their clinical condition in the late-term periods after aortocoronary shunting. All were subjected to coronaroshuntography 3.6 +/- +/- 0.

[Electrophysiologic effects of serotonin on atrioventricular conduction in dogs].

In 12 anaesthetized dogs acute effects of serotonin on the atrioventricular conduction system were studied by obtaining intracardiac electrograms. The significant increase in the heart rate and decrease in aortic pressure elicited by an intravenous infusion of 50 mg/kg.min serotonin for 30 minutes were comparable to those observed in previous investigations.

[Echo contrast study of the right chambers of the heart in patients with acquired defects and pulmonary hypertension].

Quantitative and qualitative assessments of echo contrast patterns in the right heart chambers were made in 21 patients with acquired valvular diseases and pulmonary hypertension, as compared to 8 healthy adults. Echo contrast techniques are described in detail. Echo contrast patterns were analysed on records from the tricuspid valve, pulmonary artery and inferior cava-hepatic veins.