[Radionuclide determination of the state of the venous blood return to the heart in diagnosing pulmonary hypertension].

The method for quantitative evaluation of the transfer of 90mTc-albumin bolus to the heart through the vena cava superior system in scintigraphy on the commonly used gamma chambers with a computer PdP-11/40 is substantiated. It was established that in patients with pulmonary hypertension the average pulmonary circulation time is reduced and the bolus is retained at the level of the trunk of the pulmonary artery, whereas in diminished contractility of the myocardium of the right heart the rate of venous blood return to the heart is reduced and the bolus is retained at the level of the subclavian vein.