RESUMO
Mitral balloon valvuloplasty (MBV) by Inoue technique was performed in 85 patients with symptomatic rheumatic mitral stenosis (MS). Twenty-eight patients were male and 57 patients were female. The age range was nine to 59 years (mean 28). All patients were subjected to echocardiographic and Doppler examinations before and one day after the procedure. The first 57 patients were subjected to exercise tolerance tests (ETT) a few days before and a few days after the procedure. An echocardiographic score was measured regarding valve thickening, leaflet mobility, degree of calcification and the severity of involvement of subvalvular apparatus. The mitral valve area (MVA) increased from 0.9 +/- 0.2 cm2 to 1.9 +/- 0.45 cm2, (P<0.0001). The mitral gradient (MG) decreased from 20 +/- 5.8 mm/Hg to 5.05 +/-+ 3.2 mm/Hg (P<0.0001). Mean left atrial pressure (LAP) dropped from 25.85 +/- 8.4 mm/Hg to 11.05 +/- 5.4 mm/Hg (P<0.0001). Exercise tolerance test (ETT) increased from 5.59 +/- 1.3 to 11.75 +/- 1.48 min. (P<0.0001). Complications included severe mitral regurgitation (MR) in two patients (2.3%). In the first 57 patients, mild left-to-right shunt measured by green dye dilution technique had occurred in 40% of patients. In conclusion, MBV by Inoue balloon is a good alternative to surgical commissurotomy and echocardiographic standby is very helpful when it is available. However, MBV can be safely performed if echocardiography is inaccessible.
