Assessment of left ventricular function and infarct size of acute myocardial infarction by automated function imaging
10.3760/cma.j.issn.1004-4477.2011.09.003
- VernacularTitle:自动功能成像评估急性心肌梗死患者左心室功能及梗死范围
- Author:
Bo HU
;
Qing ZHOU
;
Jia HUANG
;
Yan JIA
;
Tian WU
;
Qing DENG
;
Ruiqiang GUO
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Myocardial infarction;
Ventricular function,left;
Troponin T
- From:
Chinese Journal of Ultrasonography
2011;20(9):742-746
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess the left ventricular function of patients with acute myocardial infarction (AMI) and its correlation with cardiac troponin T (cTnT) and specific manifestation of electrocardiogram (ECG) by automated function imaging (AFI) of two-dimensional speckle tracking imaging.Methods Forty-six AMI patients who had AMI for the first time and had been treated by primary percutaneous coronary intervention and 30 healthy controls who were age and sex-related to infarct group were involved.The values of cTnT within 24 hours after admission of AMI patients were recorded and the values of ST segment elevation were measured accurately.All the subjects were analyzed for longitudinal peak systolic strain (LPSS) values and the bull' s eyes by AFI.Results Compared to control group, left ventricular ejection fraction (LVEF), global and infarcted LPSS of infarct group were significantly different and the values of ST elevation of infarct group were higher than those of control group.Both global,infarcted segmental LPSS were significant closely correlated to LVEF and cTnT,respectively (P＜0.001,all).Both global, infarcted segmental LPSS were correlated to ST elevation (P ＜0.05,all).Global LPSS had the closest correlation with LVEF (r = -0.565, P＜0.001) and so did infarcted LPSS with cTnT (r = 0.432, P ＜0.01).Conclusions As a procedural simple and rapid diagnostic tool,AFI provides reliable and useful information of the assessment of AMI.Both global and infarcted segmental LPSS have well described left ventricular function of AMI patients.Compared to LVEF, LPSS was more closely correlated to cTnT and ST segment elevation, which meant that LPSS was more sensitive and more closely related to real infarct size and actual involved range of AMI.
