Table 1.
Summary of anatomic characteristics associated with increased risk of left ventricular outflow tract obstruction after surgical and transcatheter mitral valve interventions
| Characteristic | Surgical MVr/MVR | Hybrid/transcatheter MVR |
|---|---|---|
| Aorto-mitral angle | <120 degrees | <120 degrees |
| Basal septal thickness | >15 mm | >15 mm |
| Coaptation to septum distance | <25 mm | <17.8 mm |
| Posterior leaflet height | >15 mm | - |
| LV EDD | <45 mm | <48 mm |
| Relative LV wall thickness | - | >0.38 |
| Native LVOT area | - | <372 mm2 |
| Neo-LVOT area | - | <170 mm2 |
| Virtual transcatheter valve to septum distance | - | <5.5 mm |
| Expected LVOT area reduction | - | >63.5% |
MVr, Mitral valve repair; MVR, mitral valve replacement; LV, left ventricle; EDD, end-diastolic diameter; LVOT, left ventricular outflow tract.