7Rihal CS, Nishimura RA, Holmes DR.Percutaneous balloon mitral valvuloplasty: The learning curve. Am Heart J,1991, 122(6): 1750 ～ 1756
8Aorora R, Nair M, Kalra GS, et al. Immediate and long- term results of balloon and surgical closed mitral valvotomy: a randomized comparative study. Am Heart J, 1993, 125(4): 1091 ～ 1094
9Harrison JK, Wilson JS, Hearne SE, et al. Complications related to percutaneous transvenous mitral commissurotomy.Cathet Cardiovasc Diagn, 1994, (Supp2):52 ～ 60
10Bagger JP, Sennels F, Christensen HV,et al. Transseptal left heart catheterizaton with a Swan- Ganz flow- directed catheter. Review of 173 studies. Am Heart J, 1985, 109(2) :332～337
