Predictors of In-hospital Mortality after Primary Percutaneous Coronary Intervention for ST-segment Elevation Myocardial Infarction
Introduction: Treatment of myocardial infarction (MI) has been successfully developed, especially after introducing primary percutaneous coronary intervention (PPCI) as it nowadays is the recommended treatment for ST-segment elevation myocardial infarction (STEMI). Objective: This study aimed to evaluate the in-hospital mortality of STEMI patients treated with PPCI according to gender and other likely risk factors. Methods: This cross-sectional study presents a part of the results of a single-center registry in Imam Ali cardiovascular center affiliated to Kermanshah University of medical science (KUMS). From June 2016 to December 2017, 731 consecutive patients undergoing PPCI registered. Data were collected using a case report form developed by European Observational Registry Program (EORP). The relationship between in-hospital mortality and predicting variables was assessed using the Chi-square test, t-test, and univariate and multivariate logistic regression models (Forward LR). Results: Totally, 155 patients (approximately 21%) were female. The mean age of women and men was 65.2 and 57.5, respectively (p=0.001). There were differences between women and men in hypertension (58.1% vs. 30.4%, respectively, p=0.001), diabetes mellitus (26.5% vs. 14.9%; p=0.001), hypercholesterolemia (37.4% vs. 18.6%; p=0.001), and history of prior congestive heart failure (5.2% vs. 2.0%; p=0.016). Although more men were current smokers (58.7% (men) vs. 15.5% (women); p=0.001). Women had a significantly greater incidence of multi-vessel disease, thrombolysis in myocardial infarction (TIMI) flow grade of 0/1 before PPCI, and longer symptom-to-balloon time. In-hospital mortality was higher in women than in men (5.2% vs. 1.9%; p=0.024). Multivariate analysis identified age ≥ 60 years, Killip class≥ II, and post-procedural TIMI flow grade < 3, but not female sex, as independent predictors of in-hospital mortality. Conclusion: In-hospital mortality after PPCI in women was higher than men, though this difference was likely due to the severe clinical profile in women. Also, female gender was not identified as an independent predictor of death.
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