[Contractility of the right ventricle and pulmonary circulation pressure in young sportsmen].

The paper presents some data on the structure of the systole of the right ventricle obtained by means of kinetocardiography in 280 sportsmen, aged 12-14 years, with different functional states of their organisms (non-trained, poorly and well-trained, with chronic overstraining of the heart), as well as some data on the level of the systolic pressure in the pulmonary circulation system (by the Buzstin method) at rest and during the restorative period after exercises (test of the Leningrad Institute of Physical Culture, bycycle tests). The more the organism is trained, the more distinct the stages ofthe syndrome of regulated myocardial hypodynamia were found to be, a moderate hyperfunctionof the heart is noted during physical exercises that is accompanied by slight elevations of the pressure in the pulmonary system. In cases of chronic cardiac overstraining myocardial hypodynamia, stage I--II, was found, pressure elevation in the pulmonary circulation system -- in 21.4% of the examined persons at rest, its sharp elevation after exercises (up to 78.6 mm Hg) and prolongation of the restorative period. The obtained data demonstrate the perfection of the function of the right ventricle and of the pulmonary circulation under systematic training in the adolescents, and their deterioration in cases of chronic overstraining of the heart.