5Vitale N, Renzulli A, Agozzino L, et al. Obstruction of mechanical mitral prostheses : analysis of pathologic findings [ J ]. Ann Thorac Surg, 1997,63 (4) :1101-1106.
6Aoyagi S, Fukunaga S, Suzuki S, et al. Obstruction of mechanisthesis:clinical diagnosis and surgical or nonsurgical treatment[ J]. Surgery Today,1996,26(6) :100-106.
8Matsuyama K,Matsumoto M,Sugita T,et al.Long-term results of reoperative mitral valve surgery in patients with rheumatic disease[J].Ann Thorac Surg,2003,76(6):1939-1943.