The prevalence of Brugada’s electrocardiographic(ECG) pattern in 7,022 male adolescents in the seventh grade was determined, and the same subjects were reexamined 3 years later, while in tenth grade. Two subjects(0.03%) and 7 subjects(0.10%) showed Brugada’s ECG pattern by the conventional criterion(J point or ST-segment ≥0.1 mV in leads V1 to V3), and no subjects(0%) and 2 subjects (0.03%) fulfilled the recent criterion(J point or ST-segment ≥0.2 mV) in the seventh and tenth grades, respectively, indicating that Brugada’s ECG pattern begins to appear during junior high school and increases until late adulthood.
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