ARRHYTHMIAS ASSOCIATED WITH ACUTE MYOCARDIAL INFARCTION AND THROMBOLYSIS - 09/09/11
Resumen |
Cardiac arrhythmias are quite common in the setting of acute myocardial infarction. Ninety percent of patients with acute myocardial infarction (AMI) have some cardiac rhythm abnormality, and 25% have a cardiac conduction disturbance within 24 hours of infarct onset.4 , 51 , 53 The incidence (4.5%) of serious arrhythmias such as ventricular fibrillation (VF) is greatest in the first hour of an acute myocardial infarction and declines very rapidly thereafter.56 Almost all AMI patients initially exhibit increased autonomic nervous system activity, resulting in sinus bradycardia, sometimes associated with atrioventricular block or hypotension.4 With the advent of thrombolytic therapy, it was found that rhythm disturbances may actually be a marker of successful reperfusion.34 The high incidence of identical rhythm disturbances in patients without successful coronary artery reperfusion limits specificity of arrhythmias for identifying restoration of coronary artery patency, however.14 This article addresses the role and treatment of arrhythmias and conduction disturbances that complicate the course of patients with acute myocardial infarction and thrombolysis.
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Address reprint requests to Tom P. Aufderheide, MD, FACEP, Department of Emergency Medicine, 9200 West Wisconsin Avenue, Froedtert East, Milwaukee, WI 53226 |
Vol 16 - N° 3
P. 583-600 - août 1998 Regresar al númeroBienvenido a EM-consulte, la referencia de los profesionales de la salud.
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