OBJECTIVES: To determine the factors influencing left ventricular outflow tract (LVOT) area reduction after a mitral valve-in-valve (VIV) or a valve-in-ring (VIR) procedure. BACKGROUND: Transcatheter heart valves (THVs) are increasingly used in performing a VIV or a VIR procedure in high-risk patients. Although less invasive, a potential complication is LVOT obstruction. However, the factors predisposing to LVOT obstruction are ill defined. METHODS AND RESULTS: To understand the effects of the various factors, the study was carried out in three parts: To understand the effect of VIV and VIR on reduction in LVOT area with special attention to different surgical heart valve (SHV) orientations and depth of THV implant. This was carried out in porcine and cadaver hearts. To quantify aorto-mitral-annular (AMA) angle in 20 patients with or without mitral disease and to derive a static computational model to predict LVOT obstruction. To study the effect of SHV design on LVOT obstruction after VIV. This was carried out as a bench test. LVOT area reduction was similar after VIV irrespective of orientation of the mitral SHV implantation as it pinned open the SHV leaflets. Similar effect was seen after VIR. The degree of LVOT obstruction was partly determined by AMAangle and was inversely proportional. SHV design, ring design, and depth of SPAIEN XT implantation also had effect on LVOT obstruction. CONCLUSIONS: A possibility of LVOT obstruction should be considered when performing a VIV and VIR procedure. Type of SHV, flexible ring, less obtuse AMA angle, and depth of SAPIEN XT implant can influence the risk.
OBJECTIVES: To determine the factors influencing left ventricular outflow tract (LVOT) area reduction after a mitral valve-in-valve (VIV) or a valve-in-ring (VIR) procedure. BACKGROUND: Transcatheter heart valves (THVs) are increasingly used in performing a VIV or a VIR procedure in high-risk patients. Although less invasive, a potential complication is LVOT obstruction. However, the factors predisposing to LVOT obstruction are ill defined. METHODS AND RESULTS: To understand the effects of the various factors, the study was carried out in three parts: To understand the effect of VIV and VIR on reduction in LVOT area with special attention to different surgical heart valve (SHV) orientations and depth of THV implant. This was carried out in porcine and cadaver hearts. To quantify aorto-mitral-annular (AMA) angle in 20 patients with or without mitral disease and to derive a static computational model to predict LVOT obstruction. To study the effect of SHV design on LVOT obstruction after VIV. This was carried out as a bench test. LVOT area reduction was similar after VIV irrespective of orientation of the mitral SHV implantation as it pinned open the SHV leaflets. Similar effect was seen after VIR. The degree of LVOT obstruction was partly determined by AMAangle and was inversely proportional. SHV design, ring design, and depth of SPAIEN XT implantation also had effect on LVOT obstruction. CONCLUSIONS: A possibility of LVOT obstruction should be considered when performing a VIV and VIR procedure. Type of SHV, flexible ring, less obtuse AMA angle, and depth of SAPIEN XT implant can influence the risk.
Authors: Keshav Kohli; Zhenglun Alan Wei; Ajit P Yoganathan; John N Oshinski; Jonathon Leipsic; Philipp Blanke Journal: Curr Treat Options Cardiovasc Med Date: 2018-10-26
Authors: Vasilis C Babaliaros; Adam B Greenbaum; Jaffar M Khan; Toby Rogers; Dee Dee Wang; Marvin H Eng; William W O'Neill; Gaetano Paone; Vinod H Thourani; Stamatios Lerakis; Dennis W Kim; Marcus Y Chen; Robert J Lederman Journal: JACC Cardiovasc Interv Date: 2017-04-24 Impact factor: 11.195
Authors: Jaffar M Khan; Vasilis C Babaliaros; Adam B Greenbaum; Jason R Foerst; Shahram Yazdani; James M McCabe; Gaetano Paone; Marvin H Eng; Bradley G Leshnower; Patrick T Gleason; Marcus Y Chen; Dee Dee Wang; Xin Tian; Annette M Stine; Toby Rogers; Robert J Lederman Journal: J Am Coll Cardiol Date: 2019-05-28 Impact factor: 24.094
Authors: Zouhair Rahhab; David Scott Lim; Stephen H Little; Maurizio Taramasso; Shingo Kuwata; Matteo Saccocci; Corrado Tamburino; Carmelo Grasso; Christian Frerker; Theresa Wißt; Ross Garberich; Jörg Hausleiter; Daniel Braun; Eleonora Avenatti; Victoria Delgado; Gian Paolo Ussia; Fausto Castriota; Roberto Nerla; Hüseyin Ince; Alper Öner; Rodrigo Estevez-Loureiro; Azeem Latib; Damiano Regazzoli; Nicolo Piazza; Hind Alosaimi; Peter P T de Jaegere; Jeroen Bax; Danny Dvir; Francesco Maisano; Paul Sorajja; Michael J Reardon; Nicolas M Van Mieghem Journal: J Am Heart Assoc Date: 2021-04-02 Impact factor: 5.501