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  • Title: Temporal Trends of Reperfusion Strategies and Hospital Mortality for Patients With STEMI in Percutaneous Coronary Intervention-Capable Hospitals.
    Author: Tran DT, Welsh RC, Ohinmaa A, Thanh NX, Kaul P.
    Journal: Can J Cardiol; 2017 Apr; 33(4):485-492. PubMed ID: 28256426.
    Abstract:
    BACKGROUND: The aim of this study was to examine temporal trends and provincial variations in reperfusion strategies and in-hospital mortality among patients presenting with ST-segment elevation myocardial infarction (STEMI) at hospitals in Canada capable of performing percutaneous coronary intervention (PCI). METHODS: We included patients aged ≥ 20 years who were hospitalized between fiscal years 2009 and 2013 in all provinces except Quebec. We categorized patients as receiving fibrinolysis (lysis), primary PCI (pPCI), or no reperfusion. Patients undergoing lysis were further categorized as (1) lysis + PCI ≤ 90 minutes, (2) lysis + PCI > 90 minutes, and (3) lysis only. Patients undergoing pPCI were further categorized as (1) pPCI ≤ 90 minutes and (2) pPCI > 90 minutes. We used logistic regression to examine the baseline-adjusted association between reperfusion strategy and in-hospital mortality. RESULTS: Among 44,650 STEMI episodes in 44,373 patients, 66.3% received pPCI (annual increase of 7.8%; P < 0.001). British Columbia had the highest (81.4%) rates of pPCI and New Brunswick had the lowest rates (30.2%). In-hospital mortality ranged from a high of 16.3% among patients receiving no reperfusion to a low of 1.9% among patients receiving lysis + PCI > 90 minutes (adjusted odds ratio of 0.42; 95% confidence interval, 0.32-0.55 compared with pPCI ≤ 90 minutes). CONCLUSIONS: The use of pPCI in STEMI has increased significantly in Canada; however, significant interprovincial variation remains. Changes in reperfusion strategies do not appear to have had an impact on in-hospital mortality rates. Patients who underwent lysis followed by PCI in a systematic fashion had the lowest mortality.
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