LAT Mapping and Entrainment
During geometry and electroanatomic map acquisition, the window-of-interest (WOI), 0 to 10ms shorter than the tachycardia cycle length (TCL), was set in all patients, however, LAT map was not shown on the map before ablation. The entrainment maneuvers (EM) were performed to diagnose AT if initial ablation failed to terminate AT or if AT diagnosis remained uncertain based on the ripple map.