| Summary: | Thirty-day outcomes of transcatheter mitral valve replacement for degenerated mitral bioprostheses (valve-in-valve), failed surgical rings (valve-in-ring), and native valve with severe mitral annular calcification (valve-in-mitral annular calcification) in the United States: data from the Society of Thoracic Surgeons/American College of Cardiology/Transcatheter Valve Therapy Registry. 7 Guerrero M, Urena M, Himbert D, et al. 1-year outcomes of transcatheter mitral valve replacement in patients with severe mitral annular calcification. Keywords: mitral annular calcification EN mitral annular calcification 2419 2420 2 06/10/21 20210701 NES 210701 We congratulate Alexis et al.1 and the structural heart teams from Mount Sinai and Columbia for this series of high-risk patients with mitral annular calcification (MAC) undergoing mitral intervention and for their novel classification of MAC based on treatment algorithm.
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