Why the study?
Does the antegrade transseptal method using the Inoue balloon improve mitral valve area and safety compared to the retrograde non-transseptal technique in patients undergoing percutaneous mitral valvotomy?
Does the antegrade transseptal method using the Inoue balloon improve mitral valve area and safety compared to the retrograde non-transseptal technique in patients undergoing percutaneous mitral valvotomy?
Both antegrade Inoue and retrograde non-transseptal techniques provide significant hemodynamic improvement for mitral valvotomy, with the Inoue technique yielding a slightly larger immediate valve area but similar 1-year outcomes and differing complication profiles.
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Equivalent 1-year areas support no sustained technique superiority; leaves open optimal approach pending randomized trials.
Bahl et al. (1997) studied this question.
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