Observations on the effect of atrial systole in man.
D000328:Adult; D000368:Aged; D001794:Blood Pressure; D002302:Cardiac Output; D004562:Electrocardiography; D006327:Heart Block / Q000628:therapy*; D006339:Heart Rate; D006801:Humans; D008875:Middle Aged; D010138:Pacemaker, Artificial