Desai ND, O'Brien SM, Cohen DJ, et al. - Researchers used data from the STS/ACC TVT Registry to ascertain whether there is site-level variation in transcatheter aortic valve replacement (TAVR) outcomes in the United States employing a novel 30-day composite measure. In this retrospective cohort study, the development cohort included 52,561 patients who had TAVR between January 1, 2015 and December 31, 2017. On the basis of the links with 1-year risk-adjusted mortality and health status, four periprocedural complications were discovered to incorporate in the composite risk model in addition to mortality. In this study, the quality of TAVR care received in the United States was shown to vary substantially. Findings revealed that 11% of sites were offering care below the average level of performance. In sites with worse than expected performance, substantially more common were 30-day mortality, stroke, major, life-threatening or disabling bleeding, and moderate or severe peri-valvular leak, vs other sites. The model had good aggregate reliability.