Percutaneous mitral balloon commissurotomy must be considered for those with symptomatic severe MS without LA thrombi or more than moderate MR because the degree of MR frequently increases after the procedure. (ScienceDirect)

It is our belief that a high pressure in the left auricle is helpful postoperatively in maintaining separation of the valve cusps after commissurotomy. (Chest Journal)

In performing tricuspid commissurotomy, it is essential to identify and split the fan chordae, which are always fused and which clearly delineate the fused commissures (The Annals of Thoracic Surgery)