Long-term follow-up and analysis of prediction of mortality after percutaneous coronary intervention in patients with acute ST segment elevation myocardial infarction

Objective　To explore the risk factors for mortality after percutaneous coronary intervention (PCI) in patients with acute ST segment elevation myocardial infarction (STEMI). Methods　The patients who were admitted with STEMI to our hospital between July 2008 and November 2012 undergoing PCI during hospitalization were enrolled. Case control study was conducted to observe these patients during the follow-up period for exploring the independent predictors of survival. Results　 A total of 3551 consecutive patients were enrolled in this study. These patients were followed up for 5 years with a median followup time of 406[179, 892] days. A total of 106 deaths occurred during the follow-up period. Estimated 5-year survival rate was 88.6% by Kaplan-Meier method. Female, age, diabetes, stroke, dysarteriotony, renal insufficiency, elevation of creatinine kinase isoenzyme MB (CK-MB), left ventricular end diastolic dimension, anemia, anterior myocardial infarction, PCI complications and intra-aortic balloon pump(IABP) were independent risk factors for mortality, whereas complete revascularization was associated with decreased riskof mortality. Conclusions　Long-term mortality rate of patients with STEMI is higher even after successful PCI. Less PCI complications and early complete revascularization are independent predictors for decreasing mortality rate during follow-up period. DOI: 10.11855/j.issn.0577-7402.2015.04.05