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Background Transradial (TR) access for percutaneous coronary intervention (PCI) reduces bleeding compared with transfemoral (TF) access, and may reduce mortality in specific patient subsets. However, switching from TF to TR access is associated with a learning curve and it is unclear whether benefits observed in randomized trials translate into practice. We sought to characterize the trends in bleeding and mortality rates at our institution, as we changed from being a TF to predominantly TR center over a 5-year period. Methods and Results 10,213 consecutive patients presenting for PCI were included (mean age 65.0 ± 11.6 years, 76.1% male, 48.0% PCI for acute coronary syndrome) over 5 years at a single center with PCI volume >2,000 cases per annum. Patients were stratified by initial arterial access site (TR or TF) and outcome measures included temporal trends in TR procedural failure, 30-day bleeding complications and all-cause 1-year mortality. TR procedural failure fell to a consistently low rate within 1 year (11.8% in 2008 to 2.9% in 2009, P

Transradial (TR) access for percutaneous coronary intervention (PCI) reduces bleeding compared with transfemoral (TF) access, and may reduce mortality in specific patient subsets. However, switching from TF to TR access is associated with a learning curve and it is unclear whether benefits observed in randomized trials translate into practice. We sought to characterize the trends in bleeding and mortality rates at our institution, as we changed from being a TF to predominantly TR center over a 5-year period.10,213 consecutive patients presenting for PCI were included (mean age 65.0 ± 11.6 years, 76.1% male, 48.0% PCI for acute coronary syndrome) over 5 years at a single center with PCI volume2,000 cases per annum. Patients were stratified by initial arterial access site (TR or TF) and outcome measures included temporal trends in TR procedural failure, 30-day bleeding complications and all-cause 1-year mortality. TR procedural failure fell to a consistently low rate within 1 year (11.8% in 2008 to 2.9% in 2009, P 0.001). As TR volume increased, the annual 30-day bleeding rate fell (1.64% in 2008 to 0.68% in 2012, P = 0.006). TR access predicted reduced 30-day bleeding (OR 0.17 [95%CI 0.07-0.38], P 0.001), but was not a predictor of 1-year survival (HR 0.78 [95%CI 0.58-1.05], P = 0.10).Successful transition from TF to TR PCI at our institution was rapid and associated with a reduction in 30-day bleeding. These data should encourage other centers considering the adoption of TR access.