Valve-in-valve TAVI and risk of coronary obstruction: Validation of the VIVID classification

摘要

Background: The Valve-in-Valve International Data (VIVID) registry proposed a simplified classification to assess the risk of coronary obstruction during valve-in-valve transcatheter aortic valve implantation (ViV-TAVI) based on preprocedural multi-detector computed tomography (MDCT). We investigated the validity of the VIVID classifi-cation in patients undergoing ViV-TAVI for degenerated bioprostheses.Methods: Patients undergoing ViV-TAVI for degenerated bioprostheses were prospectively included in this study. The risk of coronary obstruction among patients treated with stented valves was retrospectively evaluated based on anatomical assessment on pre-procedural MDCT.Results: Among a total of 137 patients that underwent ViV-TAVI between August 2007 and June 2021, 109 pa-tients had stented, sutureless, or transcatheter degenerated bioprosthesis of which 96 (88) had adequate MDCT data for risk assessment. High-risk anatomy for coronary obstruction (VIVID type IIB, IIIB, or IIIC) in either the left or right coronary artery was observed in 30 patients (31.3). Of the 30 patients with high-risk anatomy, coronary protection using wire protection or BASILICA (bioprosthetic or native aortic scallop intentional laceration to prevent iatrogenic coronary artery obstruction) was performed in 3 patients (10.0). Three patients treated with stentless valves and one patient treated with a stented valve with externally mounted leaflets had coronary obstruction. None of the patients with high risk anatomy according to MDCT had coronary obstruction even without coronary protection.Conclusions: Coronary obstruction occurred in none of the patients classified as high-risk patients according to the VIVID classification despite the absence of coronary protection. Refined tools are required to assess the risk of coronary obstruction.Clinical trial registration: https://www.clinicaltrials.gov. NCT01368250.