ABSTRACT
Objective: In children 2:1 Atrioventricular Block (AVB) with Wenckebach mechanism is a rare entity.
Subjects and methods: In 7 children, 2:1 Atrioventricular Block (AVB) with Wenckebach mechanism was detected. The clinical features of these children are retrospectively evaluated.
Results: All patients were asymptomatic. In all, concomitant first-degree AV block and/or periodic AV Wenckebach block suggested the presence of 2:1 block with Wenckebach mechanism. In 3 patients, this conclusion was supported by demonstration of improved AV conduction with enhanced sinus rates during treadmill test or atropine administration. In two, intracardiac electrophysiological was performed and showed a prolonged atrium-His interval. Four patients had congenital or acquired heart disease. During a median follow-up duration of 14.4 months no significant event was observed.
Conclusion: In children, 2:1 AV block with Wenckebach mechanism seems a relatively benign process.
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