Objective: To evaluate the immediate results of balloon mitral valvulplasty in mitral restenosis patients with previous surgical mitral commissurotomy.
Methods: Percuteneous balloon mitral valvuloplasty (BMV) was done in 145 cases of which 70patients had the history of previous surgical commissurotomy (Group I) and 75 patients were the new cases for the BMV (Group II).
Results: In group I the age range was 35-65 years. In group I the duration of surgical commissurotomy (SC) was of 2-18 years past. In this group the result of balloon mitral valvuloplasty (BMV) was successful in 69 cases. Mitral valve area (MVA) before the procedure was 0.5-0.9 sq cm with mean 0.7 +/- 0.2 sq cm. Following procedure the MVA was 1.2-2.0 cm2 with a mean of 1.6 +/- 0.4 cm2. Mean gradient across mitral valve (MV) before the procedure was 15-25 mm of Hg with a mean 20 +/- 5 mm of Hg and after the procedure was 3-5 mm Hg with a mean of 4 +/- 1 mm Hg. In Group I, MVA > 1.8 cm2 was achieved in 25 cases & > 1.2-1.8 cm2 in 44 cases. Mitral regurgitation > or = grade 1 occurred in 8 cases (compared to previous echocardiography). In group II the age range was between 35-60 years. The result of BMV was successful in 74 cases. MVA before the procedure was 0.4-1.2 cm2 with a mean of 0.8 +/- 0.4 cm2. Following the procedure MVA was 1.3-2.1 cm2 with a mean of 1.7 +/- 0.4 cm2. Mean gradient across the mitral valve before the procedure was 15-29 mm of Hg with a mean of 22 +/- 7 mm of Hg. Mean gradient across the mitral valve after the procedure was 2-4 mm of Hg with a mean of 3 +/- 1 mm of Hg. MVA more than 1.8 cm2 was achieved in 29 cases and between 1.3-1.8 in 45 cases.
Conclusion: BMVin patients with mitral restenosis following Surgical mitral commissurtomy can be performed with almost similar success rate like that of BMV for the first time with low risk of major cardiac complication.