The relationship of arrhythmias with LGE
The presence of LV-LGE was significantly more common in patients with VAs than in those without VAs (37.3 % vs. 14.8 %, P=0.039). LV-LGE was also more common in patients with polymorphic VAs than those with monomorphic VAs (75.0% vs. 30.2%, P=0.024), as shown in Figure 4 . In patients with VAs, LV-LGE was not associated with the number of VAs, single PVCs, coupled PVCs, PVC burdens, or the presence of NSVTs found on the Holter ECG results over a 24 h period. Table 3shows detailed information regarding the association between VAs frequencies and morphologies, and the presence of LGE in patients with VAs. As shown in Figure 4 , the presence of LV-LGE was significantly more common in patients with ST-segment depression than in those without ST-segment depression (62.5% vs. 21.0%, P=0.001). As to the extent of LV-LGE, patients with polymorphic VAs tended to have greater LV-LGE volume compared with those with monomorphic VAs (14.2 ± 14.6% vs 5.6 ± 3.8%, P=0.055). The extent of LV-LGE uptake was not significantly different between patients with and without VAs and between patients with or without ST-segment depression. LV-LGE in the midmyocardium was more common in patients with polymorphic VAs than in those with monomorphic VAs (50.0% vs 0.0 %, P=0.015). Polymorphic VAs (P=0.408) and ST depression (P=0.855) were not associated with multiple fibrotic substrates.