title: Systolic time intervals, relation to atrial contraction and leg elevation in patients with transvenous pacemakers and fixed rate pacing.
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000503:physiopathology; D001794:Blood Pressure; D002302:Cardiac Output; D002306:Cardiac Volume; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000503:physiopathology*; D006325:Heart Atria; D006327:Heart Block / Q000503:physiopathology*; D006334:Heart Function Tests; D006339:Heart Rate; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D010701:Phonocardiography; D011187:Posture; D013997:Time Factors