Immediately after PMV , mitral valve area ( MVA ) increased from 0.9 + / - 0.2 to 1.8 + / - 0.3 cm2 in group I and from 0.9 + / - 0.2 to 1.9 + / - 0.3 cm2 in group D. No significant differences existed between the two groups in terms of development of commissural splitting , commissural mitral regurgitation ( CMR ) , moderate to severe mitral regurgitation ( MR ) and MVA after PMV .
