Conclusion
In this study, we found that ERP can affect subtle myocardial dysfunction especially in IL wall and LV basal segment. This relationship can be consistent with the K+ channel density and K+ channel distribution in LV myocardium. In addition, ERP can be associated with more impaired longitudinal function than circumferential function. We therefore propose that ERP not only can lead to ion channel dysfunction but also result in myocardial dysfunction.