A woman presented severe mitral stenosis at 34 weeks' gestation. She did not respond to medical therapy, and underwent successful percutaneous mitral balloon valvuloplasty with monitored anesthetic care. The remainder of her pregnancy was uncomplicated, and she delivered a healthy infant at 38 weeks' gestation. We proved monitored anesthetic care is available method in percutaneous mitral balloon valvuloplasty for severe mitral stenosis during pregnancy.