title: Chronic heart block and sinoatrial disorder.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000209:etiology / Q000401:mortality / Q000628:therapy; D001919:Bradycardia / Q000209:etiology / Q000401:mortality / Q000628:therapy; D006327:Heart Block / Q000209:etiology / Q000401:mortality / Q000628:therapy; D006801:Humans; D010138:Pacemaker, Artificial; D012849:Sinoatrial Node