Sensitivity and specificity of strain imaging in evaluating myocardial viability among patients with ST-segment elevation acute myocardial infarction
- VernacularTitle:应变显像评价ST段抬高急性心肌梗死患者存活心肌的敏感性与特异性
- Author:
Wen RUAN
;
Xianhong SHU
;
Hongcheng SHI
;
Cuizhen PAN
;
Yi ZHOU
;
Haozhu CHEN
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Myocardial infarction;
Tomography,emission-computed,single-photon;
Myocardial viability
- From:Chinese Journal of Ultrasonography
2008;17(8):668-671
- CountryChina
- Language:Chinese
-
Abstract:
Obiective To compare the sensitivity and specificity of strain imaging(SI)and restredistribution Tl-201(RR-201 TI)SPECT imaging in evaluating myocardial viability among patients with STelevation acute myocardial infarction(AMI).Methods Twenty-six AMI patients underwent echocardiography and RR-201 Tl-SPECT imaging a week(baseline)after percutaneous coronary intervention(PCI)therapy.At baseline,wall motion score(WMS)and systolic strain were assessed,SPECT scoring were performed on 16 segments of left ventricle(LV).WMS was repeated more than 3 months later to assess myocardial viability,which is deemed as reference.Results ①Two hundred and sixty segments in the"at risk"regions were followed up for(5±2)months,among which 201 were identified as viable and 59 were not,according to the WMS.②In comparison to the reference standard,the sensitivity and specificity of RR-201 Tl-SPECT to predict myocardial viability were 87%(175/201)and 58%(34/59)respectively.③The sensitivity and specificity of systolic strain(Set)to predict myocardial viability after AMl were 81% and 66% respectively at the optimal cut-off value of-60%.④Set was moderately concordant with SPECT scoring(Kappa=0.40)and the agreement between the two methods was 77%(199/260).Conclusions In ST-elevation AMI,SI and RR-201 Tl-SPECT appears equivalent in predicting segmental recovery after reperfusion,and SI could be a convenient and low-cost alternative for the non-invasive evaluation of myocardial viability.
