Impact of hospital proportion and volume on primary percutaneous coronary intervention performance in England and Wales

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Abstract

Aim s To quantify the determinants of primary percutaneous coronary intervention (PCI) performance in England and Wales between 2004 and 2007.Methods and resultsAll 8653 primary PCI cases admitted to acute hospitals in England and Wales as recorded in the Myocardial Ischaemia National Audit Project (MINAP) 20042007. We studied the impact of the volume of primary PCI cases (hospital volume) on door-to-balloon (DTB) times and the proportion of patients treated with primary PCI (hospital proportion) on 30-day mortality and employed regression analysis to identify reasons for DTB time variations with a multilevel component to express hospital variation. The proportion of patients receiving primary PCI increased from 5 in 2004 to 20 in 2007. Median DTB times reduced from 84 min in 2004 to 61 min in 2007. Median DTB times decreased as the number of primary PCI procedures increased. The 30-day all-cause mortality rate for hospitals performing primary PCI on >25 of ST-elevation myocardial infarction patients [5.0; 95 confidence interval (CI): 3.96.1] was almost double that of hospitals performing primary PCI on more than 75 (2.7; 95 CI: 2.03.5). Time-of-day, year of admission, sex, and diabetes significantly influenced DTB times. Hospital variation was evident by a hospital-level DTB time standard deviation of 12 min.Conclusion sThere was a large variation in DTB times between the best and worst performing hospitals. Although patient-related factors impacted upon DTB times, the volume and proportion of patients undergoing primary PCI were significantly associated with delay and early mortalityhospitals with the highest proportion of primary PCI had the lowest mortality. © 2010 The Author.

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West, R. M., Cattle, B. A., Bouyssie, M., Squire, I., De Belder, M., Fox, K. A. A., … Gale, C. P. (2011). Impact of hospital proportion and volume on primary percutaneous coronary intervention performance in England and Wales. European Heart Journal, 32(6), 706–711. https://doi.org/10.1093/eurheartj/ehq476

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