10.7 Heart rate variability trends in 90-minute period prior to onset of ventricular arrhythmias in ICD patients

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�pattern in the V1 lead with the ST-segment elevation 0.2mV of a coved-type ECG was defined as “typical” Brugada-type ECG. Results: the Brugada-type ECG was found in 11 (10male) of 20387 children (0.054%, 95%CI: 0.022% to 0.086%). There was no child with typical Brugada-type ECG. The prevalence of Brugada-type ECG in male was significantly higher than that of female even in children (0.096% versus 0.010%, P=0.012), and was increased according to aging (first grader: 0.01%, fourth grader: 0.05%, seventh grader: 0.08%, tenth grader: 0.23%, p<0.008. ANOVA). Conclusions: the prevalence of Brugada-type ECG in Japanese children was much lower than that reported previously in adult population (0.7%) and was increased according to aging.