定量分析主动脉瓣和二尖瓣关闭不全的心肌收缩期力学参数  

Quantitative Analysis of Myocardial Mechanics Parameters in Patients with Aortic and Mitral Regurgitation

作　　者：田家玮[1] 杨恩荣[1] 孙艳荣 韩蕴新 杨品清 李英杰[1] 

机构地区：[1]哈尔滨医科大学第二医院,哈尔滨工业大学材力学教研室,黑龙江省农场总局总医院,哈尔滨铁路中心医院

出　　处：《中国医学影像技术》1994年第4期268-270,共3页Chinese Journal of Medical Imaging Technology

基　　金：卫生部科研基金

摘　　要：本文根据弹性力学原理使用超声心动图仪配合录像机、微机测量主动脉瓣关闭不全和二尖瓣关闭不全各１０例和５０例正常人瞬时左室收缩期室壁应力（每单位面积的力）一应变（每单位长度的变化）关系。结果表明：国人主动脉瓣关闭不全者左室收缩期最大心肌弹性劲度（ｍａｘＥａｖ）由正常人１１２．８±２３．５增至１３８．８±４７．３４ｋＰａ，零应力壁间小轴径（Ｄｏｍ）由正常３．９±０．５２ｃｍ增至６．０２±１．０１ｃｍ；二尖瓣关闭不全者ｍａｘＥａｖ由正常值增加至１５０．０４±３２．４５ｋＰａ，Ｄｏｍ由正常值增至５．０４±０．５４ｃｍ。ｍａｘＥａｖ和Ｄｏｍ是评估心肌收缩性变化的理想指标。本文对主动脉瓣和二尖瓣关闭不全的心肌收缩力进行了定量分析。Systolic left ventricular wall stress(force per unit area)-strain (change in lengh per unit length)relations were computed in 10 cases of aortic regurgitation and 10 cases of mitral regurgitation and 50 normal subjects according to theories of elasticity by echocardiography and videorecorder and computer in this paper.The results showed that both systolic maxmum myocardial stiffness(max Eva,112.8±23.5 vs 138.81±47.34 kPa)and zero stress midwall minor diameter(Dom) increased(3.94±0.52 vs 6.02±1.01cm)in aortric regurgitation,the max Eav increased to 150.04±32.45kPa the Dom increased to 5.04±0.54 in mitral regurgitation.Max Eav and Dom are the ideal indexes assessing changes in myocardial contractility.Quantitative analysis of systolic force of myocardium were made for aortic and mitral regurgitation.

关 键 词：心肌力学 二尖瓣关闭不全 主动脉瓣 关闭不全 

分 类 号：R542.502[医药卫生—心血管疾病]