Abstract
In the paper by Persson and colleagues1 published in this issue of The Annals of Thoracic Surgery, the authors utilized a large national data set to compare long-term outcomes in patients who underwent aortic valve replacement according to type of bioprosthesis. This analysis of 12,845 patients reported that, among propensity-matched cohorts, a statistically significant improvement in survival was noted at 15 years favoring porcine valves (15% vs 17%, P = .001), although patients with bovine valves were significantly less likely to undergo reoperation (hazard ratio, 1.48; 95% confidence interval 1.11-1.98).
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