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目的探讨不同类型机械瓣对二尖瓣置换术患者术后血流动力学的影响.方法选择我院收治的52例行二尖瓣置换术患者作为研究对象，根据术中使用机械瓣类型的不同将患者分为双叶瓣组和倾斜碟瓣两组，每组26例，术后对患者进行1年的随访，观察两组患者手术后的血流动力学超声参数.结果双叶瓣组和倾斜碟瓣组患者术后左房内径(LA)及E波峰值速度之间的差异有统计学意义(<0.05).两组患者的左室内径(LV)/右室内径(RV)/平均跨瓣压差(MPG)以及肺动脉收缩压(PASP)组间差异未见统计学意义(＞0.05).结论在二尖瓣置换手术中使用双叶瓣对患者血流动力学的影响优于倾斜碟瓣.“,”(Department of Cardiovascular Surgery,The First Affiliated Hospital of Kunming Medical University,Kunming 650032,Yunnan,China) Objective To investigate the hemodynamics influence of different types of mechanical valve in patients with mitral valve replacement. Methods 52 patients who underwent mitral valve replacement in our hospital were selected as research object,according to the different type of mechanical valves were divided into bileaflet valve group and tilting disc valve group,26 cases in each group.After one years of follow-up,observed the hemodynamic parameters of cases in two groups.Results The difference of left atrial diameter (LA)and E wave peak velocity between bileaflet group and tilting disc valve group was statistically significant ( 0.05).Conclusion Bileaflet valve has better hemodynamic influence than tilting disk valve in patients with mitral valve replacement.