title: Atrioventricular sequential pacing and pacemakers.
mesh_terms: D000368:Aged; D001146:Arrhythmia, Sinus / Q000503:physiopathology / Q000628:therapy*; D001919:Bradycardia / Q000503:physiopathology / Q000628:therapy*; D004562:Electrocardiography; D004566:Electrodes; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D008722:Methods; D010138:Pacemaker, Artificial