What structural features preclude a transcatheter edge-to-edge repair in a patient with severe symptomatic tricuspid regurgitation?  

Evidence of severe calcification in the annulus or subvalvular apparatus Evidence of moderate to severe calcification in the grasping area Excessive chordae structure in the grasping area Presence of perforation in the grasping area Leaflet length < 8 mm Septolateral coaptation gap > 10...