Aortic valve replacement in the elderly: determinants of late outcome.
Ashikhmina EA, Schaff HV, Dearani JA, Sundt TM, Suri RM, Park SJ, Burkhart HM, Li Z, Daly RC. Aortic valve replacement in the elderly: determinants of late outcome. Circulation. 2011 Aug 30; 124(9):1070-8.