32. Maes F, Lerakis S, Barbosa Ribeiro H, et al. Outcomes from transcatheter aortic valve replacement in patients with low-flow, low-gradient aortic stenosis and left ventricular ejection fraction less than 30%: a substudy from the TOPAS-TAVI registry. JAMA Cardiol. 2019;4:64 70. 33. Elmariah S, Fearon WF, Inglessis I, et al. Transapical transcatheter aortic valve replacement is associated with increased cardiac mortality in pa- tients with left ventricular dysfunction: insights from the PARTNER I trial. JACC Cardiovasc Interv. 2017;10:2414 22. 34. Makkar RR, Fontana GP, Jilaihawi H, et al. Transcatheter aortic-valve replacement for inoperable severe aortic stenosis. N Engl J Med. 2012;366:1696 704. 35. Kolte D, Khera S, Vemulapalli S, et al. Outcomes following urgent/emer- gent transcatheter aortic valve replacement: insights from the STS/ACC TVT registry. JACC Cardiovasc Interv. 2018;11:1175 85. 36. Nagao K, Taniguchi T, Morimoto T, et al. Acute heart failure in patients with severe aortic stenosis insights from the CURRENT AS registry. Circ J. 2018;82:874 85. 37. Szerlip M, Arsalan M, Mack MC, et al. Usefulness of balloon aortic valvu- loplasty in the management of patients with aortic stenosis. Am J Cardiol. 2017;120:1366 72. 38. Bongiovanni D, K hl C, Bleiziffer S, et al. Emergency treatment of decom- pensated aortic stenosis. Heart. 2018;104:23 9. 4. AORTIC REGURGITATION 4.1. Acute Aortic Regurgitation 4.1.1. Diagnosis of AR 1. Hamirani YS, Dietl CA, Voyles W, et al. Acute aortic regurgitation. Circula- tion. 2012;126:1121 6. 2. Stout KK, Verrier ED. Acute valvular regurgitation. Circulation. 2009;119:3232 41. 3. Patel PA, Bavaria JE, Ghadimi K, et al. Aortic regurgitation in acute type-A aortic dissection: a clinical classification for the perioperative echocardiog- rapher in the era of the functional aortic annulus. J Cardiothorac Vasc Anesth. 2018;32:586 97. 1. Hamirani YS, Dietl CA, Voyles W, et al. Acute aortic regurgitation. Circula- tion. 2012;126:1121 6. 2. 