Journal
JOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY
Volume 16, Issue 8, Pages 912-916Publisher
WILEY
DOI: 10.1111/j.1540-8167.2005.50040.x
Keywords
ventricular tachycardia; ventricular fibrillation; right ventricular outflow tract
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Idiopathic ventricular tachycardia (VT) originating from the right ventricular outflow tract (RVOT-VT) and idiopathic RVOT-extrasystoles are generally considered benign arrhythmias. We described three cases who originally presented with typical benign looking RVOT-extrasystoles or RVOT-VT but developed malignant polymorphic VT during follow-up. The unusual aspect of their RVOT-extrasystoles was their coupling interval, which appears to be intermediate between the ultra-short coupling interval of idiopathic VF and the long coupling interval seen in the truly benign RVOT-VT.
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