'Para' AV nodal re-entry tachycardias.

Aim AV node, para AV nodal, and parahisian areas are usually not clearly defined in the literature. Radiofrequency catheter ablation in these areas may be deleterious to normal AV conduction. The purpose of this contribution is to discuss the anatomy in these areas in relation to outcome an AV conduction disturbances after radiofrequency ablation. Guidelines for therapeutic management of AV nodal re-entry tachycardia and tachycardias with involvement of a parahisian pathway, will be discussed.