title: Sinoatrial dysfunction presenting with bradycardia or sinoatrial block.
mesh_terms: D001146:Arrhythmia, Sinus / Q000150:complications* / Q000503:physiopathology; D001919:Bradycardia / Q000209:etiology*; D002037:Bundle-Branch Block / Q000209:etiology; D005260:Female; D006327:Heart Block / Q000209:etiology*; D006801:Humans; D008297:Male; D012849:Sinoatrial Node / Q000503:physiopathology; D013575:Syncope / Q000209:etiology