Immediate and Long-Term Results of Mitral Balloon Valvotomy for Restenosis Following Previous Surgical or Balloon Mitral Commissurotomy

This study compared immediate with long-term results of mitral balloon valvotomy (MBV) in patients who underwent MBV as an initial procedure versus those who underwent repeat MBV. Fifty-six patients who were a mean age of 28 ± 8.8 years (group A) and had mitral restenosis after surgical or balloon commissurotomy underwent MBV and were compared with 524 patients who were a mean age of 31 ± 11 years (group B) and underwent MBV as an initial procedure. Prospective data obtained included demographic, hemodynamic, echocardiographic, and clinical follow-up for 0.5 to 15 years after MBV. No deaths or technical failure were encountered after MBV. Mitral regurgitation >2/4 occurred in 1 patient (2%) in group A and in 9 patients (2%) in group B (p = 0.24). Fifty-two of 56 patients (93%) in group A had good immediate results (mitral valve area ≥1.5 cm 2, mitral regurgitation