The recent history of the para-hisian atrial tachycardia (PHAT) looks a lot like the older history of the atrioventricular (AV) nodal reentry tachycardia (AVNRT). The debate about precise anatomic boundaries of AV nodal reentry continues today again in the AVNRT, even 75 odd years after the first suspect that some mechanisms of supraventricular tachycardia could involve the region of the AV node. In this type of arrhythmia, the first target for the catheter ablative therapy was the fast pathway of […]