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• W2362842738 abstract "Objective To quantitatively assess the changes in shape and function of mitral annulus(MA) in moderate or more degree mitral regurgitatin(IMR) resulted from ischemic cardiomyopathy in different locations,and provide a pre-peration evaluation for mitral valvuloplasty.Methods Real-time 3-dimensional transesophageal echocardiography(RT-3D-TEE) was performed in 20 paroxysmal atrial fibrillation patients,11 anterior myocardial infarction(MI) patients with moderate IMR,and 11 inferior or posterior MI patients with moderate IMR.The real-ime three-dimensional dynamic images were obtained in a complete cardiac cycle.The parameters of RT-3D-TEE,including maximum area of MA in projection plane(A-max),change rate of MA area in projection plane(A-change),maximum area of MA in projection plane timing(AR-R%),maximum perimeter of MA(C-max),change rate of MA perimeter(C-change),maximum height of MA(H-max),change rate of MA height(H-change),MA maximum displacement from end diastole(D),anterolateral to posteromedial diameter of annulus(DAIPm),anterior to posterior diameter of annulus(DAP),and DAIPm/DAP,were analyzed by 3D-QLab software.Results For the values of A-change,AR-R%,C-change,and D,they were(22.5±5.7)%,(54.6±5.0)%,(13.9±4.2)%,and(15.1±1.8)mm in the group of control;were(18.4±4.1)%,(58.8±5.8)%,(12.5±2.9)%,and(11.2±1.6)mm in the group of anterior;were(16.0±4.1)%,(62.8±7.1)%,(8.0±2.6)%,and(11.1±2.3) mm in the group of inferior-posterior respectively.There were significant differences among the three groups in the above parameters(F=6.780,7.245,9.827,22.346,P0.05).The values of A-change in groups of anterior and inferior-posterior were significantly lower than that in group of control(t=-2.23,P=0.032;t=-3.53,P=0.001).However,there were no significant differences between anterior and inferior-posterior(t=1.15,P=0.258).The AR-R% appeared in the diastolis for all of the three groups.But the AR-R% in inferior-posterior occurred significantly later than other two groups.The values of AR-R% in groups of anterior and inferior-posterior were higher than that in group of control,but the significant difference was present only in the comparison of inferior-posterior and control(t=3.76,P=0.001).There was also no significant difference between inferior-posterior and anterior(t=1.62,P=0.113).The values of C-change in groups of anterior and inferior-posterior were lower than that in group of control(t=4.39,P=0.000;t=-2.98,P=0.005).But no significant difference between anterior and control was found(t=-1.01,P=0.318).Similarly,the values of D in groups of anterior and inferior-posterior were lower than that in group of control(t=-5.43,P=0.000;t=-5.57,P=0.000).But no significant difference between anterior and inferior-posterior was found(t=0.12,P=0.903).In addition,there were no significant differences among the three groups in the following parameters: A-max,C-max,H-max,H-change,DAIPm,DAP,DAIPm/DAP(F=1.340,1.440,0.391,1.421,0.046,0.926,1.107,all P0.05).Conclusions MA tracking by RT-3D-TEE was feasible for all subjects in this study.The function impairment of MA is relatively more severe in inferior or posterior MI patients with moderate or more degree IMR.We can quantitatively assess the change of MA in patients with mitral regurgitation due to ischemina of different locations,and provide evidence for targeted surgical mitral valvuloplasty." @default.
• W2362842738 created "2016-06-24" @default.
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• W2362842738 date "2012-01-01" @default.
• W2362842738 modified "2023-09-23" @default.
• W2362842738 title "Quantification of mitral annulus dynamics in different locations of ischeminc mitral regurgitation using transesophageal real-time 3-dimensional echocardiography" @default.
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