• American heart journal · Mar 2014

    Observational Study

    Reperfusion times and in-hospital outcomes among patients with an isolated posterior myocardial infarction: insights from the National Cardiovascular Data Registry (NCDR).

    • Stephen W Waldo, Daniel A Brenner, Shuang Li, Karen Alexander, and Peter Ganz.
    • Department of Medicine, Division of Cardiology, Massachusetts General Hospital, Boston, MA. Electronic address: swaldo@partners.org.
    • Am. Heart J. 2014 Mar 1;167(3):350-4.

    BackgroundA posterior myocardial infarction (PMI) is associated with significant morbidity and delays in recognition may prevent the timely revascularization of these patients. The present study sought to evaluate the reperfusion times and in-hospital outcomes among patients with an isolated PMI.MethodsClinical characteristics and reperfusion times were compared between those with an isolated PMI and those with all other ST-elevation myocardial infarctions (STEMI) in the NCDR ACTION-GWTG Registry from 2007 to 2012. Logistic generalized estimating equations were used to examine risk-adjusted mortality.ResultsAmong 117,739 subjects with a STEMI, 824 (0.7%) had evidence of an isolated PMI. The median time between patient arrival and initial electrocardiogram was similar between those with an isolated PMI and those with a non-PMI STEMI (6 vs. 6 minutes, P = .48). However, the median time from initial electrocardiogram to percutaneous coronary intervention was significantly longer among subjects with a PMI (69 vs 61 minutes, P < .01) and fewer patients achieved a door-to-balloon time less than 90 minutes (83% vs 89%, P < .01). After multivariable adjustment, in-hospital mortality was similar for PMI patients compared to those with a non-PMI STEMI (AOR: 1.11, 95% CI: 0.83-1.50).ConclusionThe door-to-balloon times are significantly longer for those with an isolated PMI resulting in fewer patients receiving reperfusion within the guideline recommended time period. Ongoing educational initiatives to increase recognition of a PMI are needed to improve the reperfusion times and outcomes associated with this condition.Copyright © 2014 Mosby, Inc. All rights reserved.

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