Complexities of Junctional Tachycardias

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Abstract
Complexities of functional Tachycardias. The atrioventricular junction is a compact area in which most of the known electrophysiologic substrates and mechanisms play a role in the genesis and maintenance of tachyarrhythmias. The purpose of this review is to summarize the data on normal atrioventricular junction anatomy and electrophysiologic function and correlate that information with surface electrocardiographic recordings, intracardiac electrophysiologic data, and interventional data from surgical and catheter techniques. Models of tachycardia mechanisms are proposed for typical and atypical atrioventricular nodal reentrant tachycardia, permanent Junctional reciprocating tachycardia, and orthodromic supraventricular tachycardias utilizing “intermediate septal” accessory connections.

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