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Treatment of recurrent ischemia after thrombolysis and successful reperfusion for acute myocardial infarction effect of in hospital mortality and left ventricular function

Treatment of recurrent ischemia after thrombolysis and successful reperfusion for acute myocardial infarction effect of in hospital mortality and left ventricular function

Journal of the American College of Cardiology 17(3): 752-757

To determine the effect of treatment of recurrent ischemia after reperfusion for acute myocardial infarction on in-hospital mortality and left ventricular function recovery and to identify patients at highest risk of serious consequences in the event of recurrent ischemia in this setting, 405 consecutively treated patients were studied retrospectively. All patients received intravenous thrombolytic therapy within 6 h of ST segment elevation-documented infarction and had angiographic confirmation of their reperfusion status performed within 120 min of treatment. Three hundred three patients had successful reperfusion with or without rescue angioplasty and had no recurrent ischemia (group 1), 74 patients had initially successful reperfusion but subsequent recurrent ischemia (group 2) and 28 patients had failed reperfusion (group 3). The in-hospital mortality in groups 1 to 3 was 2.0%, 14.9% and 32.1%, respectively (p less than 0.001) and the change from baseline to prehospital discharge left ventricular ejection fraction was 1.2 .+-. 9.3%, -0.8 .+-. 8.7% and -4.3 .+-. 5.3%, respectively (p = NS). Within the recurrent ischemia group (group 2), multiple regression analysis found absence of cardiogenic shock at presentation (p = 0.002) and successful treatment initiated within 90 min of recurrent ischemia (p = 0.045) to be the only variables independently correlated with in-hospital survival. Later successful reperfusion was not associated with improved hospital survival. The timing and success of treatment did not affect recovery of global or regional left ventricular function in the patients with paired angiographic studies. Thus, 1. Recurrent ischemia after successful reperfusion for acute myocardial infarction was associated with decreased in-hospital survival, 2. Successful early treatment of ischemia in this setting was associated with improved survival compared with later successful treatment or unsuccessful treatment at any time, and 3. Mortality risk with recurrent ischemia was not easily stratified with readily available clinical variables.

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Accession: 007967293

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PMID: 1993797

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