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Twenty-four hour ambulatory ECG monitoring of junior high school students in Miki City.

To evaluate incidence of serious arrhythmias among school age youths, 24-hour ambulatory ECG monitoring was performed in 100 junior high school students, including 60 subjects with some ECG abnormalities and 40 without. With this monitoring 2 cases with multifocal VPCs and 2 cases with paired VPCs or nonsustained ventricular tachycardia were found; the case with VT died suddenly after having been lost during careful follow up. It is emphasized from these results that ambulatory ECG monitoring is quite useful in selected cases in this age group and careful follow up of students with advanced grade VPCs is very important.