[RADIOELECTROCARDIOGRAPHY AS A METHOD OF DETERMINING CARDIAC ACTIVITY DURING THE PERFORMANCE OF WORK].
D004562:Electrocardiography; D005080:Exercise Test; D006331:Heart Diseases; D006334:Heart Function Tests; D006801:Humans; D005082:Physical Exertion
ELECTROCARDIOGRAPHY; EXERCISE TEST; EXERTION; HEART DISEASES; HEART FUNCTION TESTS
RADIOEL'EKTROKARDIOGRAFIIA KAK METOD ISSLEDOVANIIA DEIATEL'NOSTI SERDTSA VO VREMIA PROIZVODSTVENNO I RABOTY.