Utility of 64-MSCT in assessing acute non-reperfused myocardial infarct size
10.3969/j.issn.1671-5411.2013.03.007
- Author:
Xinkai QU
;
Weiyi FANG
;
Jianding YE
;
Shaofeng GUAN
;
Ruogu LI
;
Yingjia XU
;
Yan SHEN
;
Min ZHANG
;
Hua LIU
- Publication Type:Journal Article
- Keywords:
Multi-slice computed tomography;
Acute non-reperfused myocardial infarction;
Time-factors;
Animal model
- From:
Journal of Geriatric Cardiology
2013;(3):247-252
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the utility of multi-slice computed tomography (MSCT) in assessing acute non-reperfused myocardial infarct size. Methods Seven domestic pigs (mean weight 17.3 ± 1.9 kg) underwent ligation of the distal left anterior descending artery to establish a model of acute myocardial infarction (MI). MSCT and triphenyltetrazolium chloride (TTC) staining were performed two hours later. The following data were acquired and analyzed:MI volume (%), CT values of the infarcted region, left ventricular cavity and normal cardiac tissue at various scanning time-points (1, 5, 10, 15, 20 min after contrast injection). Results Using MSCT, the overall MI volume showed a time-dependent decrease, with a reduction of 28.87%after 20 min. The greatest reduction occurred at the 5 min time-point. In TTC staining, MI volume was 9.87%± 2.44%. When MI size, as determined by MSCT, was compared with that by TTC staining in Bland-Altman plots, there was a better agreement at 5, 10, and 15 min time-points at 1 and 20 min. Conclusions The study indicates that double-phase scanning examination using MSCT is a useful tool to assess MI size, and the optimal late-phase scanning time-point set within 5-15 min of contrast injection.
