Bicuspid Aortic Valve Leaflet Modification Before Transcatheter Aortic Valve Replacement

BACKGROUND: Transcatheter aortic valve replacement (TAVR) deployment in bicuspid aortic valve (BAV) can result in deformed transcatheter heart valves (THVs) due to incomplete, irregular, and eccentric stent expansion. Adjunctive pre-TAVR leaflet modification (LM)/splitting techniques may potentially reduce the circumferential leaflet stress exerted by the BAV leaflets on the THV, reduce risk of immediate complications, and improve THV expansion. OBJECTIVES: The aim was to introduce a new paradigm of pre-TAVR BAV LM and a proof-of-concept for THV geometry improvement. METHODS: )x100%. RESULTS: Both the 4 ex vivo bench cases and the 5 computed tomography-based simulation models demonstrated improvement in expansion ratio (up to 33%) and eccentricity (up to 31%) of deployed SEV/BEV THVs with pre-TAVR BAV splitting compared to their deployment in native BAVs without LM. For the BEV deployment in a type 1 bench model, dual pre-TAVR splitting yielded >10% increase in THV area and ∼5% decrease in ovality compared to a single split. CONCLUSIONS: In this proof-of-concept study, pre-TAVR BAV LM presents a promising adjunctive technique to promote THV expansion and circularity.