The cost-effectiveness ratio for surgical aortic valve replacement (SAVR), compared to no surgery, was estimated at $13,528 per quality-adjusted life year (QALY) (~$17,225 in 2017 dollars).
Wu Y, Jin R, Gao G, Grunkmeier G, Starr A. Cost-Effectiveness of Aortic Valve Replacement in the Elderly: An introductory story. J Thorac Cardiovasc Surg. 2007; 133(3): 608-13. http://www.jtcvsonline.org/article/S0022-5223(06)02087-3/fulltext