Results:
TMVI with the use of balloon-expandable valve system was performed for 24 bioprostheses, 7 annuloplasty rings, and 12 native valves. Compared to patients without increase in LVOT gradient (∆PG <10 mmHg; n=33), patients with increase in LVOT gradient (∆PG ≥10 mmHg; n=10) had smaller LV end-systolic volume (LVESV), greater LV ejection fraction (LVEF) and smaller aorto-mitral (AM) angle. LVOT area at the valve stent distal edge showed strong association with ∆PG (r=-0.68, P<0.0001). Only small AM angle was associated with small LVOT area at the valve stent distal edge on multivariable analysis, independent of LVESV and LVEF.