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  • Title: In-hospital percutaneous coronary intervention improves in-hospital survival in patients with acute inferior myocardial infarction particularly with right ventricular involvement.
    Author: Owens CG, McClelland AJ, Walsh SJ, Smith BA, Stevenson M, Khan MM, Adgey JA.
    Journal: J Invasive Cardiol; 2009 Feb; 21(2):40-4. PubMed ID: 19182288.
    Abstract:
    OBJECTIVE: Assess the interaction between fibrinolysis and in-hospital percutaneous coronary intervention (PCI) in patients with inferior myocardial infarction (MI), particularly those with electrocardiographic evidence of right ventricular infarction (RVI). DESIGN: Retrospective observational study. PATIENTS: Consecutive patients with inferior MI identified from an MI registry between January 1998 and January 2004. INTERVENTIONS: Propensity analyses and multiple regression analysis were used to determine the mortality benefit of PCI. MAIN OUTCOME MEASURES: In-hospital morbidity and mortality. RESULTS: In total, 465 patients with inferior MI received fibrinolytic therapy (median pain-to-needle time of 167 minutes; IQR 100-311 minutes). The main predictors of PCI were recurrent chest pain, peak creatine kinase, age, reinfarction, presence of heart failure and male gender. Significant independent predictors of in-hospital mortality were age > or = 75 years, RVI, initial systolic blood pressure < or = 80 mmHg, female gender and no in-hospital PCI. In-hospital PCI was performed in 184/465 (40%) patients; 55 (30%) had rescue PCI performed < or = 6 hours post fibrinolysis, 45 (24%) within 6-24 hours and 84 (46%) > or = 24 hours. In-hospital PCI was associated with reduced in-hospital mortality (PCI: 9 [5%] vs. no PCI: 40 [14%]; p < 0.001) mainly in those with RVI (PCI: 8 [8%] vs. no PCI 33 [23%]; p = 0.002) compared with no RVI (PCI: 1 [1%] vs. no PCI 7 [5%]; p = 0.1). CONCLUSION: A strategy of timely fibrinolysis combined with in-hospital PCI including rescue PCI may result in a significant reduction in in-hospital mortality and morbidity in patients with inferior MI, particularly those with RVI.
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