EXPERIMENTAL STUDY ON ABNORMAL MOTION OF MITRAL ANNULUS IN ACUTE MYOCARDIAL INFARCTION WITH DOPPLER TISSUE IMAGING
- VernacularTitle:多普勒组织成像对急性心肌梗死二尖瓣环异常运动的实验研究
- Author:
Ruixia TIAN
;
Lusheng ZUO
;
Baozhe ZHAO
- Publication Type:Journal Article
- Keywords:
Doppler tissue imaging;
myocardial ischemia;
myocardial infarction mitral annulus;
ventricular function,left
- From:
Medical Journal of Chinese People's Liberation Army
1983;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
To evaluate the value of Doppler tissue imaging(DTI) to assess left ventricular systolic and diastolic function by determining motion frequency of the mitral annulus in acute myocardial ischemia and myocardial infarction. The left anterior descending coronary artery(LAD) was ligated in 10 pigs and systolic motion velocity(Sa), early diastolic velocity(Ea), late diastolic velocity(Aa) and Ea/Aa of lateral mitral annulus in apical 4 chamber view using DTI velocity model before and after ligation of LAD were determined.The results were compared with routine Doppler. In basal state, Ea/Aa was positively correlated with VE/VA (the ratio of early and late diastolic velocity of mitral flow) with Doppler imaging (?=0.82). After the ligation of LAD, Sa, Ea and Ea/Aa significantly decreased, while there was no difference in Aa. DTI is simple and easy for determining mitral annulus motion. It is a new quantitative and non invasive method to evaluate left ventricular function. [HS(2*2/3]
