Comparison of Left Ventricular Global Strain in Anterior and Non-anterior Wall Myocardial Infarction With CMR Tissue Tracking

Figures

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  FIGURE 1. Flow chart of grouped method AWMI: anterior wall myocardial infarction. NAWI, non-anterior wall myocardial infarctions.

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  FIGURE 2. Manual delineation the border of endocardium and endocardium at the diastole image (A–C). The marker was placed at the junction of left and right ventricle (A). Defining the long axis of the ventricle (B,C). Take the global peak radial strain (D), circumferential strain (E), and longitudinal strain (F) value for statistics.

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  FIGURE 3. AWMI: CMR-LGE demonstrated MI involving anterior and partial septum wall. Tissue Char ROI view, the outline of endocardium and epicardium drew firstly, then the boundary point was set of the septum with the free wall. The pink counter was used to set in the hyperintensity area, the blue counter was set in the hypointensity area. The software will run the infarct size automatically. GRS of anterior MI was significantly decreased (blue part). 16 AHA segment map showed the GCS of anterior significantly decreased (green part). NAWMI: CMR-LGE demonstrated MI involving the inferior wall. Tissue Char ROI sketch view. GRS of non-anterior MI had significantly decreased (blue-green part). Sixteen AHA segment map showed the GCS of non-anterior had significantly decreased (nattier blue part). LGE, late gadolinium enhanced; GRS, global radial strain; GCS, global circumferential strain; GLS, global longitudinal strain.

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  FIGURE 4. Comparison of GRS, GCS, GLS between AWMI and NAWMI, excluding the MI group were significantly different from the control group, the GCS was also significantly different between anterior with non-anterior MI. The mean GCS of AWMI was lower than NAWMI.

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  FIGURE 5. Comparison by the site of MI showed GRS, GCS, and GLS were significantly different with respect to different transmurality degree in AWMI.