(1) Objective To establish a new way of cardiac valvoplasty.

(2) Mitral valvoplasty in 2 patients and mitral valve replacement in 9 and aortic valve replacement in 3 and double valve replacement in 10 were performed.

(3) Objective To summarize the patients of mitral valvoplasty in pediatrics, for extensive understanding the indications, surgical techniques and clinical results.

(4) Objective Quantitatively assessing the immediate and long - term effect of mitral balloon valvoplasty on severe pulmonary hypertension and cardiac output.

(5) Objective To evaluate the surgical characteristics, methods and clinical effect of pediatric valvoplasty through an analysis of valvoplasty in children in the age from 15 h to 14 years.

(6) Objective Quantitatively assess the immediate and long-term effect of mitral balloon valvoplasty on severe pulmonary hypertension and cardiac output.

(7) Objective To study the clinical results and operative methods of mitral valvoplasty in patients of congenital heart disease with mitral insufficiency.