The effect of myocardial infarction induced by distal left ascending artery occlusion on left ventricular synchronism: an experimental study
- VernacularTitle:心肌梗死对左心室同步性影响的实验研究
- Author:
Yinguang SUN
;
Qi ZHANG
;
Lijin PU
;
Wen RUAN
;
Weifeng SHEN
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Myocardial infarction;
Ventricular function,left
- From:
Chinese Journal of Ultrasonography
2008;17(7):624-626
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the effect of myocardial infarction induced by distal left ascending artery occlusion on left ventrieular(LV) synchronism. Methods Routine echocardiography and vector velocity imaging were performed within 2 hours before and 7-14 days after myocardial infarction by occluding distal left ascending coronary arteries in experimental pigs. Routine eehocardiographie parameters of LV, including end diastolic and systolic diameters, volumes, and spherical indexes were measured or calculated. Six segmental peak systolic velocity, strain and strain rate were compared between pre- and post-myocardial infarction. Results After myocardial infarction, LV end diastolic, end systolic long diameter and end systolic volume increased with decreased ejection fraction. With the 6 segmental systolic velocity, strain and strain rate significantly reduced,the mean 6-segmental time to peak strain rate delayed significantly. Conclusions Abnormal synchronism after myocardial infarction may aggravate LV systolic dysfunction.
