4Vitale N,Cappabianca G,Visicchio G, et al. Midterm evaluation of the Sorin Bicarbon heart valve prosthesis: single-center experience[J]. Ann Thorac Surg,2004,77(2):527-531.
5Torn M, van der Meer FJ, Rosendaal FR. Lowering the intensity of oral anticoagulant therapy: effects on the risk of hemorrhage and thromboembolism[J]. Arch Intern Med, 2004,164(6):668-673.
6Bharat V, Das NK, Mohanty B,et al. Reduction of mechanical heart valve thrombosis through a clinical audit[J]. J Heart Valve Dis,2003,12(3):362-369.
7Wu Y, Gregorio R, Renzulli A,et al. Mechanical heart valves: are two leaflets better than one?[J]. J Thorac Cardiovasc Surg, 2004,127(4):1171-1179.