Initial Outcomes After Trans-Right Subclavian Transcatheter Aortic Valve Implantation ― Analysis of Device Coaxiality ―

Background: Trans-subclavian access transcatheter aortic valve implantation (TAVI), typically from the left side, is feasible. However, right subclavian artery access is technically challenging because of the anatomical orientation, resulting in malalignment of the transcatheter heart valve within the aortic annular plane. Methods and Results: We aimed to evaluate procedural outcomes, device-annulus alignment, and clinical efficacy of right trans-subclavian (RtTS) TAVI. Of a consecutive 423 patients who underwent TAVI, 32 cases performed via right and left subclavian access were analyzed. Implanted device depth and angle were analyzed angiographically. The device-annulus angle was measured angiographically. Fifteen of 22 patients were treated with a balloon-expandable valve, and 7 patients received a self-expanding valve, via RtTS. Procedural success was achieved in all cases. Compared with femoral and left subclavian approaches, RtTS led to a significantly larger device-annulus angle (6.0° vs. 8.7°; P