“…Several studies have determined the reference values of LV volumes and LV ejection fraction (LVEF) (Aune, Baekkevar, Rodevand, & Otterstad, 2010;Bernard et al, 2017;Chahal et al, 2012;Fukuda et al, 2012;Kaku et al, 2011;Muraru et al, 2013). Although some studies have addressed normal values of 3DE determined LA volumes, majority of current 3DE quantification software was not aimed for LA volume analysis, or it required extensive and tedious manual tracing on LA endocardial border at several time points of the cardiac cycle (Aune, Baekkevar, Roislien, Rodevand, & Otterstad, 2009;Badano et al, 2016;Russo et al, 2017;Wu et al, 2013). Recently, a novel semiautomatic 3DE software, which has capability of both LV and LA volume measurements throughout one cardiac cycle, has been developed.…”