2003;41:1316 24. 15. Saisho H, Arinaga K, Kikusaki S, et al. Long term results and predictors of left ventricular function recovery after aortic valve replacement for chronic aortic regurgitation. Ann Thorac Cardiovasc Surg. 2015;21:388 95. 16. Mentias A, Feng K, Alashi A, et al. Long-term outcomes in patients with aortic regurgitation and preserved left ventricular ejection fraction. J Am Coll Cardiol. 2016;68:2144 53. 17. Yang L-T, Michelena HI, Scott CG, et al. Outcomes in chronic hemodynam- ically significant aortic regurgitation and limitations of current guidelines. J Am Coll Cardiol. 2019;73:1741 52. 18. de Meester C, Gerber BL, Vancraeynest D, et al. Do guideline-based indi- cations result in an outcome penalty for patients with severe aortic regur- gitation? JACC Cardiovasc Imaging. 2019;12:2126 38. 19. Yang LT, Enriquez-Sarano M, Michelena HI, et al. Predictors of progres- sion in patients with stage B aortic regurgitation. J Am Coll Cardiol. 2019;74:2480 92. 20. Cawley PJ, Hamilton-Craig C, Owens DS, et al. Prospective comparison of valve regurgitation quantitation by cardiac magnetic resonance imaging and transthoracic echocardiography. Circ Cardiovasc Imaging. 2013;6:48 57. 21. Cranney GB, Lotan CS, Dean L, et al. Left ventricular volume measure- ment using cardiac axis nuclear magnetic resonance imaging. Validation by calibrated ventricular angiography. Circulation. 1990;82:154 63. 22. Dulce MC, Mostbeck GH, O Sullivan M, et al. Severity of aortic regurgi- tation: interstudy reproducibility of measurements with velocity-encoded cine MR imaging. Radiology. 1992;185:235 40. 23. Gelfand EV, Hughes S, Hauser TH, et al. Severity of mitral and aortic re- gurgitation as assessed by cardiovascular magnetic resonance: optimizing correlation with Doppler echocardiography. J Cardiovasc Magn Reson. 2006;8:503 7. 24. Myerson SG, d Arcy J, Mohiaddin R, et al. Aortic regurgitation quantifi- cation using cardiovascular magnetic resonance: association with clinical outcome. Circulation. 2012;126:1452 60. 25. Kammerlander AA, Wiesinger M, Duca F, et al. 