Trauma to the sinuatrial node.
D000328:Adult; D001285:Atropine / Q000627:therapeutic use; D004562:Electrocardiography; D006801:Humans; D006973:Hypertension / Q000209:etiology; D002546:Ischemic Attack, Transient / Q000188:drug therapy / Q000209:etiology; D008297:Male; D009333:Neck / Q000098:blood supply; D012849:Sinoatrial Node / Q000293:injuries*; D014683:Vena Cava, Superior / Q000293:injuries
D001285:Atropine