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  • Title: Long-term clinical and echocardiographic outcome in patients with mitral stenosis treated with percutaneous transvenous mitral commissurotomy.
    Author: Saeki F, Ishizaka Y, Tamura T.
    Journal: Jpn Circ J; 1999 Aug; 63(8):597-604. PubMed ID: 10478809.
    Abstract:
    Long-term follow-up after percutaneous transvenous mitral commissurotomy (PTMC) is limited. Ninety-four middle-aged (51+/-9 years) mitral stenosis patients who underwent successful PTMC were followed up with annual echocardiography for 6.1+/-1.4 years. PTMC success was defined as either mitral valve area (MVA) >1.5 cm2 or a MVA of more than twice the pre-procedural value, together with no worsening of mitral regurgitation >grade 2+. Mitral valve replacement (MVR), worsening of congestive heart failure (CHF), and thromboembolism were sought for survival analysis. Restenosis was defined as loss of more than 50% of the initial procedural MVA gain. Functional limit of daily activities was assessed through a questionnaire. The study population was divided into group 1 (post-procedural MVA >2.0 cm2), group 2 (MVA > 1.5 cm2 and < or = 2.0 cm2) and group 3 (MVA < or = 1.5 cm2). The 6-year survival with freedom from MVR, CHF, thromboembolism, and combined events (MVR+CHF) was 92%, 95%, 91%, and 88%, respectively. No group 1 patient experienced MVR or CHF. Restenosis was predominant in group 3. Deterioration of daily activities during follow-up was not observed in group 1; however, it was significant in group 2 (p<0.05) and group 3 (p<0.001). These results demonstrated that patients who attained a large MVA (>2.0cm2) immediately after PTMC maintained their procedural benefit with less clinical complication and with less limitation of daily activity.
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