Predictive Value of Cardiac Magnetic Resonance for Left Ventricular Remodeling of Patients with Acute Anterior Myocardial Infarction

Figure 1. According to late gadolinium enhancement, the infarcted segments and remote non-infarcted segments were defined. Red and green were used to outline the endocardial and epicardial contours of the left ventricle, respectively. Myocardium was divided into infarcted (I, yellow) and remote non-infartced segments (R, red) based on the American Heart Association 16-segment mode after the healthy myocardium was delineated by a blue circle. Remote non-infarcted segments were defined as unenhanced zone with one unenhanced border segments between them and infarcted segments.

Figure 2. The area under ROC curves of the global parameters and regional parameters as a marker to predict LVR. (a) The AUCs of the LVEF, GLS, GLS + LVEF for predicting the occurrence of were 0.789 (95% CI 0.708–0.870), 0.812 (95% CI 0.731–0.893), and 0.832 (95% CI 0.758–0.907), respectively, all p < 0.001. (b) The AUCs of CSinfarct, IS, IS+CSinfarct for predicting the occurrence of were 0.861 (95% CI 0.793–0.930), 0.778 (95% CI 0.696–0.860), and 0.917 (95% CI 0.870–0.965), respectively, all p < 0.001. ROC, receiver operating characteristic; LVR, left ventricular remodeling; AUCs, the area under ROC curves; LVEF, left ventricular ejection fraction; GLS, global longitudinal strain; CSinfarct, circumferential strain in infarcted segments; IS, infarct size.

Figure 3. Discriminative prognostic power of GLS + LVEF and peak CSinfarct+IS. Area under ROC curves of GLS + LVEF in comparison to peak CSinfarct+IS for the prediction of LVR. Peak CSinfarct+IS revealed a significantly higher AUC than GLS + LVEF did (0.917, 95% CI: 0.870–0.965 p < 0.001 vs. 0.832, 95% CI 0.758–0.907, p < 0.001. AUC difference: 0.085, p < 0.05). GLS, global longitudinal strain; LVEF, left ventricular ejection fraction; CSinfarct, circumferential strain in infarcted segments; IS, infarct size; ROC, receiver operating characteristic; LVR, left ventricular remodeling; AUC, the area under ROC curve.