[SIGNIFICANCE OF THE VALSALVA MANEUVER IN THE EVALUATION OF BLOOD CIRCULATION].
D006334:Heart Function Tests; D006801:Humans; D014636:Valsalva Maneuver
HEART FUNCTION TESTS; VALSALVA'S MANEUVER
ZNACHENIE PROBY VAL'SAL'VY DLIA OTSENKI FUNKTSII KROVOOBRASHCHENIIA.