The effect of mental arithmetic on the heart rate and vectorcardiographic parameters of cardiac recovery.
D000293:Adolescent; D000328:Adult; D000368:Aged; D003327:Coronary Disease / Q000523:psychology; D004644:Emotions; D005260:Female; D006339:Heart Rate; D006349:Heart Valve Diseases / Q000523:psychology; D006801:Humans; D008297:Male; D008433:Mathematics; D008875:Middle Aged; D011340:Problem Solving; D014672:Vectorcardiography