1. Objective To assess efficacy of percutaneous balloon mitral valvotomy (PBMV) with an Inoue balloon catheter in the treatment of mitral stenosis with high pulmonary hypertension.

2. Objective To evaluate the effects of percutaneous balloon mitral valvotomy (PBMV) for mitral stenosis (MS) with moderate mitral regurgitation (MR), particularly with bad mitral condition.

3. Objective:To study the mechanism and the management of complications of percutaneous balloon mitral valvotomy(PBMV).

4. Transannular RVOT pericardium patch enlargement gives more satisfactory results than pulmonary valvotomy in patient with RVOT obstruction.

5. Objective:To evaluate the role of transesophageal echocardiography(TEE) combined with X-ray fluoroscopy in guiding percutaneous balloon mitral valvotomy (PBMV).

6. This article reports the clinical study of 1063 patients who underwent percutaneous balloon mitral valvotomy (PBMV) and 1043 patients among them who did successfully (98.2%).

7. Objective To evaluate the effects of percutaneous balloon mitral valvotomy (PBMV) for mitral stenosis (MS) with mitral regurgitation (MR).

8. Objectives: To analyse the outcome and to mechanism of complications and to propose methods for the prevention of percutaneous balloon mitral valvotomy (PBMV).