title: Heat Stroke-Induced Sinoatrial Node Dysfunction.
abstract: BACKGROUND
  Heat stroke has been associated with stress-induced cardiomyopathy and electrocardiogram ST segment elevation and depression. Laboratory studies with dogs have demonstrated heat stroke-induced sinoatrial node dysfunction in the setting of hyperkalemia. No prior case report has described heat stroke-induced complete sinoatrial node dysfunction that resolved in the emergency department.
  
  
  METHODS
  An 87-year-old female presented to the emergency department with heat stroke and severe bradycardia. Initial electrocardiogram demonstrated complete sinoatrial node dysfunction. The bradycardia responded to external cardiac pacing and the sinoatrial node dysfunction resolved with aggressive cooling. Emergency physicians should be aware that heat stroke can cause complete sinoatrial node dysfunction and that this bradydysthrmia can be treated with aggressive cooling.
authors: Department of Emergency Medicine, Temple University Hospital, Philadelphia, PA.
authors: Daniel
authors: D
authors: Case
authors: Department of Emergency Medicine, Temple University Hospital, Philadelphia, PA.
authors: Richard
authors: R
authors: Harrigan
mesh_terms: D000369:Aged, 80 and over; D001919:Bradycardia / Q000503:physiopathology* / Q000628:therapy; D002304:Cardiac Pacing, Artificial; D004562:Electrocardiography; D004636:Emergency Service, Hospital; D005260:Female; D018883:Heat Stroke / Q000503:physiopathology*; D006801:Humans; D007036:Hypothermia, Induced; D012849:Sinoatrial Node / Q000503:physiopathology*
keywords: ECG; EKG; bradycardia; cooling; electrocardiogram; environmental emergency; heat stroke; sinoatrial node