[Effect of short-term antiorthostatic hypokinesia on carbohydrate metabolic indices and on the beta-lipoprotein content in human blood].

Before and after 5-day bed rest in the head-down position (at an angle of --4.5 degrees) the healthy male test subjects were exposed to selective catheterization with blood samples withdrawn drom different compartments of the cardiovascular system. The content of glucose insulin lactic acid and beta-lipoproteins was measured.

Short-term immobilization of healthy men: right ventricular function and metabolism during graded exercise.

Five healthy male volunteers were subjected to graded exercise tests on a bicycle ergometer (600 kpm/min for 8 minutes) with simultaneous catheterization of the right cardiac ventricle and radial artery, first before immobilization and them after five-day bed rest in the head-down posture (the foot bed end was elevated 4.5 degrees). After immobilization, during exercise the stroke index did not increase, the tachycardia was more marked, the indicators of right ventricular contractility increased [+ max dp/dt, mas (dp/dt) /P, --mas dp/dt], the arterial pressure decreased, and the lactic acid level in mixed venous blood rose.