Electrocardiographic manifestations: wide complex tachycardia due to accessory pathway

James A Nelson, Kirk U Knowlton, Richard Harrigan, Marc L Pollack, Theodore C Chan
Journal of Emergency Medicine 2003, 24 (3): 295-301
Tachycardia with a wide QRS complex is usually due to ventricular tachycardia (VT), supraventricular tachycardia (SVT) with aberrant intraventricular conduction, or an accessory pathway-mediated dysrhythmia. The most common type of accessory pathway causing a wide complex tachycardia is the atrioventricular bypass tract. Distinguishing the accessory pathway-mediated tachycardia from VT or SVT with aberrancy is often difficult, but has important clinical consequences. This article will review the diagnosis of wide complex tachycardia due to an accessory pathway and its related management in the emergent setting.

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