Diagnosis and management of bradycardia and atrioventricular block associated with acute coronary ischemia.
Bradyarrhythmias arising in the setting of myocardial infarction occur in a significant minority of patients with AMI. In the majority of cases, these abnormalities are owing to myocardial ischemia or infarction with necrosis of the cardiac pacemaker sites and/or conduction system. Other factors responsible for these bradyarrhythmias include altered autonomic influence, systemic hypoxia, electrolyte disturbances, acid-based disorders, and complications of various medical therapies. This article will focus on not only the diagnosis and management of these rhythm disturbances, but also on the pathophysiology of the arrhythmias.
Brady
W J
WJ
Departments of Emergency Medicine and Internal Medicine, University of Virginia School of Medicine, Charlottesville, VA, USA. wb4z@hscmail.mcc.virginia.edu
Harrigan
R A
RA
D000318:Adrenergic beta-Agonists / Q000627:therapeutic use; D000628:Aminophylline / Q000627:therapeutic use; D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D001285:Atropine / Q000627:therapeutic use; D001919:Bradycardia / Q000175:diagnosis* / Q000188:drug therapy* / Q000209:etiology; D002316:Cardiotonic Agents / Q000627:therapeutic use; D003937:Diagnosis, Differential; D004452:Echocardiography; D004562:Electrocardiography; D004636:Emergency Service, Hospital; D005934:Glucagon / Q000627:therapeutic use; D006327:Heart Block / Q000175:diagnosis* / Q000188:drug therapy* / Q000209:etiology; D006801:Humans; D007545:Isoproterenol / Q000627:therapeutic use; D017202:Myocardial Ischemia / Q000150:complications*
D000318:Adrenergic beta-Agonists; D000889:Anti-Arrhythmia Agents; D002316:Cardiotonic Agents; D000628:Aminophylline; D001285:Atropine; D005934:Glucagon; D007545:Isoproterenol