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Document Details :
Title: From a wide to a narrow QRS tachycardia and back. What is the mechanism?
Author(s): V. Firsovaite , M. Duytschaever , R. Tavernier
Journal: Acta Cardiologica
Volume: 67 Issue: 2 Date: 2012
A 40-year-old man developed a near syncope during exercise due to a wide complex tachycardia with periods of changing RR intervals accompanied by changes in QRS morphology. The differential diagnosis of this electrocardiographic pattern is discussed.