title: Systolic time intervals in A-V block before and during pacing of the heart.
mesh_terms: D000368:Aged; D001794:Blood Pressure; D002306:Cardiac Volume; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000503:physiopathology* / Q000628:therapy; D006329:Heart Conduction System / Q000503:physiopathology*; D006339:Heart Rate; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D010701:Phonocardiography; D011674:Pulse