Comparisons between patients with IVF and those with BrS
The clinical and ECG characteristics of 35 patients with IVF and 15 patients with BrS are shown in Table 2. Among patients with IVF, J point elevation ≥ 0.1 mV in the 3rd ICS was present in 14 patients. VF developed during physical efforts more often in IVF patients without J point elevation in the 3rd ICS than BrS patients (P<0.05). There was no difference in activity status at the onset of VF between IVF patients with and without J point elevation in the 3rd ICS. There was no difference in other clinical characteristics and ECG findings among three groups. The frequency of inferolateral ER was similar in three groups. There was no difference in ECG findings except for Brugada ECG in three groups.