title: Lazy sinus syndrome.
mesh_terms: D000368:Aged; D001146:Arrhythmia, Sinus / Q000175:diagnosis / Q000628:therapy; D004562:Electrocardiography; D005260:Female; D006801:Humans; D010138:Pacemaker, Artificial; D012849:Sinoatrial Node / Q000503:physiopathology