Pulsus alternans: physiologic study by noninvasive techniques.
D000328:Adult; D000368:Aged; D001794:Blood Pressure; D002302:Cardiac Output; D002339:Carotid Arteries / Q000502:physiology*; D004562:Electrocardiography; D006321:Heart / Q000502:physiology; D006339:Heart Rate; D006801:Humans; D007702:Kinetocardiography; D008297:Male; D009119:Muscle Contraction; D010701:Phonocardiography; D011674:Pulse; D013997:Time Factors