Predictive value of myocardial strain on myocardial infarction size in ST-segment elevation myocardial infarction with preserved LVEF

With the development of the emergency system, we can see more and more acute ST-segment elevation myocardial infarction patients with preserved left ventricular ejection fraction.the predictive value of myocardial strain as determined by cardiac magnetic resonance (CMR) for myocardial infarct size could not been clarified by previous investigations in STEMI patients with preserved LVEF. The present study reveals incremental value of global circumferential strain (GCS), determined by CMR, for the prediction of infarction size after STEMI, above and beyond LVEF as well as global longitudinal strains. The findings of this study suggest that GCS may represents a potential marker of infarct size and may be used to better guide drug therapy. It may be beneficial to use GCS to determine the infarct size and prognosis of post-MI patients who do not qualify for contrast imaging.