Valvular heart disease
Comparison of Long-Term Outcome After Mitral Valve Replacement or Repeated Balloon Mitral Valvotomy in Patients With Restenosis After Previous Balloon Valvotomy

https://doi.org/10.1016/j.amjcard.2006.12.088Get rights and content

Symptomatic mitral stenosis (MS) develops in 7% to 21% of patients after percutaneous mitral balloon valvotomy (PMV). Treatment options for these patients are surgical mitral valve replacement (MVR) or repeated PMV. However, no comparisons were made between these 2 procedures regarding long-term outcome. This retrospective study compares the long-term outcome of 888 patients with symptomatic MS after MVR or repeated PMV who underwent PMV from April 1988 to December 2003. Thirty-two patients subsequently underwent repeated PMV, and 59 patients underwent MVR for symptomatic MS. Mean follow-up was 85 ± 43 months with a maximum follow-up of 15 years. Patients with MVR have more unfavorable clinical characteristics, including a higher incidence of atrial fibrillation and severe mitral regurgitation. Event-free survival was similar between the 2 groups up to 40 months after the procedure; 3-year event-free survival rates were 96.6% for MVR patients and 90.0% for repeated PMV patients (p = 0.215). However, after 40 months, the outcome was more favorable for MVR. Comparing MVR versus PMV, 6-year event-free survival rates were 93.0% versus 75.9% (p = 0.036), and 9-year event-free survival rates were 90.4% versus 36.0% (p <0.001). In conclusion, the long-term outcome of patients with symptomatic MS after previous PMV was more favorable after MVR than after repeated PMV. These data suggest that MVR may be the preferred mode of therapy in patients with unfavorable valve morphologic characteristics and no co-morbid disease.

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Patients

Eight hundred eighty-eight patients underwent PMV in our institution from April 1988 to December 2003. Of these, we identified 32 patients who underwent repeated PMV for symptomatic restenosis (repeated-PMV group) and 59 patients who underwent MVR (MVR group) during the same period. Criteria for choosing MVR or repeated PMV in patients with restenosis were at the discretion of the attending physician. Clinical outcome (such as repeated procedure, stroke, readmission for heart failure, and

Pre- and postprocedural characteristics of patients

Baseline characteristics of both groups of patients are listed in Table 1. Repeated PMV was performed at 72.7 ± 34.3 months after initial PMV and MVR at 57.6 ± 35.2 months after initial PMV. Patients in the repeated-PMV group were generally younger than those in the MVR group (42 ± 11 vs 50 ± 10 years, p = 0.001) and had a lower incidence of atrial fibrillation (29% vs 55%, p = 0.02). Pre- and postprocedural echocardiographic parameters are listed in Table 2. There was a significant increase in

Discussion

The present study compares MVR with repeated PMV in patients with mitral restenosis after previous PMV for whom long-term follow-up >10 years could be analyzed. Data show that MVR is associated with better long-term event-free survival and remains superior to repeated PMV for up to 15 years after surgery. These data suggest that MVR may be the preferred mode of therapy for patients who are expected to benefit during a long period. The strength of this study is the availability of data for

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