ECG-gated Cardiac Magnetic Resonance Imaging for Myocardium and the Results of Echocardiography and Thallium SPECT Scan

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• 作者：Ting-Kai Leung¹ ; ² ; Chun-Yao Huang³ ; Chi-Ming Lee¹ ; ² ; ^{hk8648@tmu.edu.tw} ; Chung-Huei Hsu⁴ ; Hung-Jung Wang¹ ; Ching-Huei Kung¹ ; Yi-Hsiang Lin¹ ; Huey-Min Yeh¹ ; Pen-Yuan Liao¹ ; Yu-Ching Ting¹ ; Han-Yun Hsiao¹
• 关键词：bull's eye target figure ; cardiac MRI ; echocardiography ; thallium SPECT scan ; viable myocardium
• 刊名：Journal of Experimental & Clinical Medicine
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：4
• 期：5
• 页码：275-279
• 全文大小：371 K

文摘

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Objective

This study was to investigate the usefulness and limitations of cardiac magnetic resonance imaging (MRI). We compared echocardiography (ECHO) and perfusion scans to evaluate: left ventricular wall scar formation of the myocardium; hypokinesis, akinesis, or dyskinesis of the myocardium; regurgitation of the aortic and mitral valves; post acute myocardial infarction (AMI) ventricular function; and the viable myocardium (ischemia/infarction).

Methods

Twenty patients received both cardiac MRI and ECHO. Among them, nine patients received perfusion scans. The modalities and methods examined in this study were not the most advanced or updated protocols.

Results

We compared the results of cardiac MRI with those of ECHO and perfusion scans. We found significant correlations between the interpretations of left ventricular wall morphological change with dynamic images for hypokinesia, akinesia, and dyskinesia of the myocardium. We also found possible correlations between cardiac MRI and perfusion scans regarding their results to produce a ¡°bull's eye target figure¡± to evaluate severe ischemia and infarctions.

Conclusion

We found that cardiac MRI provided a useful adjunct to ECHO on interpretations of left ventricular wall morphological change. The correlations between qualitative interpretations of cardiac MRI versus perfusion scan respective to ¡®bull's eye target figures¡¯, were found to be moderately matching. There was an unsatisfactory mismatching of correlations between quantitative by manual input and the drawing inaccuracy and an unavoidable error of the post-processing technique of cardiac MRI on ejection fraction (EF) and end systolic volume (ESV).