[Radionuclide ventriculography for evaluating left ventricular myocardial contractility in patients with implanted pacemaker].

An EKC-500 pacemaker was implanted in 16 patients with coronary heart disease (CHD) and 14 idiopathic conduction disturbance for complete atrioventricular block. After surgery, the patients underwent equilibrium radionuclide ventriculography by using a nuclear stethoscope at rest and during exercise at different stimulation rates with the aim of choosing their optimal values. It was established that patients with idiopathic conduction disturbances showed improved left ventricular contractility at all stimulation rates and their optimal values ranged 60-70 per minute.

[State of intracardiac hemodynamics in patients with sick sinus syndrome during cardiac pacing].

A EKS-500 pacemaker was implanted in 36 patients with the sick sinus syndrome. Out of them, 18 patients had coronary heart disease, 6, hypertensive disease and myocardial hypertrophy, and 12, idiopathic arrhythmias. After surgery, equilibrium radionuclide ventriculography was performed in the patients at rest in the presence of spontaneous rhythm and pacing, as well as during exercise.

[Functional state of the myocardium during transesophageal cardiac pacing in patients with ischemic heart disease selected for surgical treatment based on nuclear stethoscope findings].

A nuclear stethoscope was used to examine central hemodynamic parameters and myocardial contractility in 70 patients with coronary heart disease (CHD). The findings were analyzed according to the degree of cicatricial changes in the myocardium and coronary atherosclerotic lesion. The patients, unlike apparently healthy individuals, were found to show an increase in systolic cardiac output and a decrease in left ventricular ejection fraction in response to transesophageal cardiac pacing.

[Ultrasonic diagnosis of gastric motor-emptying disorders].

A method for ultrasonic examination of gastric motor evacuatory function, available for clinical practice, has been developed. Results of parallel estimation of the gastric contents half-life period by the ultrasonic and scintigraphic techniques evidence a high accuracy of the suggested method of echographic estimation of gastric function. Accelerated evacuation of the gastric contents was revealed in patients with duodenal ulcer without ++pyloric stenosis++.

[Radionuclide ventriculography in the evaluation of left-ventricular function in patients with arterial hypertension].

Systemic and intracardiac hemodynamic parameters were examined in 29 patients with arterial hypertension by radionuclide ventriculography. No impairments were found in resting left ventricular pump function in the patients. Left ventricular diastolic function exhibited 24 and 34.