1Bonow RO,Carabello BA,Chatterjee K,et al.2008 focused updateincorporated into the ACC/AHA 2006 guidelines for the managementof patients with valvular heart disease[J].J Am Coil Cardiol,2008,52 (13) : 142.
6Wakamatsu M,Katoh H, Kondo U, et al. Combined spinal and epidural anesthesia for orthopaedic surgery in the elderly [J]. Masui , 1997,40(12) : 1766-1769.
7Liu SS, Mc Donald SB. Current issues in spinal anesthesia [J]. Anesthesiology ,2001,94(5): 888-906.