Two cases of sudden leaflet dehiscence after transcatheter aortic valve replacement

Background Transcatheter aortic valve replacement (TAVR) has caused a paradigm shift in the treatment of severe aortic stenosis. Although less invasive and good early results of TAVR have been reported, the long-term durability of the transcatheter aortic valve is still unclear. Case presentation We performed an emergent surgical aortic valve replacement (SAVR) for two cases of acute heart failure due to sudden transcatheter aortic valve dehiscence after 7 or 6 years of primary TAVR. In both cases, transthoracic echocardiography revealed severe transvalvular regurgitation of the transcatheter aortic valve. Intraoperative findings revealed dehiscence on both sides of the anatomical non-coronary cusp without evident signs of degeneration, such as thickening, calcification, or infection. The postoperative course of the cases was uneventful, and the patients were discharged home on days 20 and 48 after the reoperation. Conclusions Although the cause of the valvular disease is unknown, we are seriously concerned that the number of similar cases will increase in the future. We should be cautious in expanding the application of TAVR without evidence of long-term safety.