Patient Population and Characteristics
83 patients were eligible between November 2018 and June 2020 (Figure 3). 10 patients withdrew consents, and 12 had successful ablation in the left ventricular outflow tract. 33 patients assigned to supravalvular strategy and 28 assigned to subvalvular strategy were included in the analysis. Baseline characteristics between the two groups were similar (Table 1). 34/61(55.7%) of the EVA sites were above PV, and 33/34(97.1%) were within 10mm above PVVJ (Figure 4A). The overall EVA-site distribution was not significantly different (P=0.447).