Comparison of long-term results of percutaneous mitral balloon valvotomy with closed transventricular mitral commissurotomy at a single North American institution

Long-term (>3 years) follow-up data were obtained from 102 consecutive pati ents undergoing percutaneous mitral balloon valvotomy (PMBV). Data were col lected prospectively by review of the medical record, mailed questionnaire, and/or telephone. Data on patients with closed mitral commissurotomy (CMC) at our institution have been previously reported and serve as the comparis on group, Follow-up data was 98% complete at a mean of 57 months for PMBV p atients. Compared with patients undergoing CMC, these patients were older ( 54 +/- 14 vs 43.6 +/- 10 years, p <0.001) and more likely to have undergone previous mitral valve surgery (17% vs 4%, p < 0.001). The observed 5-year survival in the PMBV group was no different from that observed in the CMC g roup (83% vs 90 %, p NS) or from that predicted by the model developed from the CMC patients. Commissural calcium was associated with death and death or repeat mitral valve procedure in the multivariate analysis. Long-term su rvival free from repeat procedures was equivalent when patients with commis sural calcium were excluded. Thus, PMBV offers longterm survival and freedo m from subsequent mitral valve procedures similar to CMC, (C) 1999 by Excer pta Medica, Inc.