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Effects of PTMC (percutaneous transvenous mitral commissurotomy) were evaluated retrospectively in 34 patients with mitral stenosis and compared with those of OMC (open mitral commissurotomy) in 28 patients. PTMC resulted in a decrease in transmitral pressure gradient from 11 +/- 6 to 6 +/- 4 mmHg (p < 0.001) and an increase in cardiac index from (2.4 +/- 0.4 to 2.7 +/- 0.5 L/min.m2 and mitral valve area from 1.0 +/- 0.3 to 1.7 +/- 0.4 cm2 (p < 0.001). Mitral valve area remained increased (1.6 +/- 0.4 cm2) after a mean follow-up period of 19 +/- 11 months. Death, cerebro-vascular accident, or sever mitral regurgitation (> III degrees) did not occur. NYHA class improved from 2.28 +/- 0.63 to 1.44 +/- 0.50 (p < 0.001). OMC resulted in a greater increase in mitral valve area (from 1.1 +/- 1.4 to 2.0 +/- 0.5 cm2, p < 0.001) and greater improvement of NYHA class (2.25 +/- 0.65 to 1.11 +/- 0.34, p < 0.001). Thus OMC surpasses PTMC in hemodynamic effects and symptomatic improvement. However, PTMC may still be the first choice for the treatment of mitral stenosis because of its excellent safety and efficacy.
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