Korean Journal of Radiology

The Korean Society of Radiology (대한영상의학회)
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Usefulness of Multidetector-row CT in the Evaluation of Reperfused Myocardial Infarction in a Rabbit Model

Park, Jong-Min;Choe, Yeon-Hyeon;Chang, Samuel;Sung, Yon-Mi;Kang, Seok-Seon;Kim, Min-Joo;Han, Boo-Kyung;Choi, Sang-Hee

  • Published : 20040100
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Abstract

Objective: To evaluate the usefulness of multidetector-row computed tomography (CT) in the evaluation of reperfused myocardial infarction. Materials and Methods: Eleven rabbits were subjected to 90-min occlusion of the left anterior descending coronary artery followed by reperfusion. Multidetector-row CT was performed 31 hours ${\pm}$ 21 after the procedure and preand post-contrast multiphase helical CT images were obtained up to 10 min after contrast injection. The animals were sacrificed after 30 days and histochemical staining of the resected specimens was perfomed with 2'3'5-triphenyl tetrazolium chloride (TTC). Results: In all 11 cases, the areas of myocardial infarction demonstrated with TTC-staining were identified on the CT images and the lesions showed hypoenhancement on the early phases up to 62 sec and hyperenhancement on the delayed phases of 5 min and 10 min compared with normal myocardial enhancement. The percentage area of the lesion with respect to the left ventricle wall on CT was significantly correlated with that of the TTC-staining results ($\rho$< 0.001 for both early and delayed phase CT) according to the generalized linear model analysis. The areas showing hypoenhancement on early CT were significantly smaller than those with hyperenhancement on delayed CT ($\rho$ < 0.0001). Conclusion: Multidetector-row CT may be useful in the detection and sizing of reperfused myocardial infarction.

Keywords

References

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