9. Gammie JS, O Brien SM, Griffith BP, et al. Influence of hospital procedural volume on care process and mortality for patients undergoing elective surgery for mitral regurgitation. Circulation. 2007;115:881 7. 10. Kilic A, Shah AS, Conte JV, et al. Operative outcomes in mitral valve sur- gery: combined effect of surgeon and hospital volume in a population- based analysis. J Thorac Cardiovasc Surg. 2013;146:638 46. 11. Vassileva CM, Boley T, Markwell S, et al. Impact of hospital annual mitral procedural volume on mitral valve repair rates and mortality. J Heart Valve Dis. 2012;21:41 7. 12. Nishimura RA, O Gara PT, Bavaria JE, et al. 2019 AATS/ACC/ASE/SCAI/STS ex- pert consensus systems of care document: a proposal to optimize care for patients with valvular heart disease: a joint report of the American Association for Thoracic Surgery, American College of Cardiology, American Society of Echocardiography, Society for Cardiovascular Angiography and Interventions, and Society of Thoracic Surgeons. J Am Coll Cardiol. 2019;73:2609 35. 13. Ando T, Adegbala O, Villablanca PA, et al. Failure to rescue, hospital vol- ume, and in-hospital mortality after transcatheter aortic valve implanta- tion. Am J Cardiol. 2018;122:828 32. 14. Edwards FH, Ferraris VA, Kurlansky PA, et al. Failure to rescue rates af- ter coronary artery bypass grafting: an analysis from the Society of Thoracic Surgeons Adult Cardiac Surgery Database. Ann Thorac Surg. 2016;102:458 64. 15. Scali ST, Giles KA, Kubilis P, et al. Impact of hospital volume on patient safety indicators and failure to rescue following open aortic aneurysm re- pair. J Vasc Surg. 2020;71:1135 46.e4. 16. Ghaferi AA, Birkmeyer JD, Dimick JB. Hospital volume and failure to res- cue with high-risk surgery. Med Care. 2011;49:1076 81. 17. Gonzalez AA, Dimick JB, Birkmeyer JD, et al. Understanding the volume- outcome effect in cardiovascular surgery: the role of failure to rescue. 