Abstract

Background Recent anatomical and electro-physiological studies demonstrated that in the human atrioventricular node there are two main extension rightward and leftward posterior nodal extension LPNE The occurrence of eccentric retrograde atrial activation has been demonstrated to be from 6 to 8 in patients with AVNRT by several previous reports Objectives The study was performed to confirm that standard right atrium ablation is effective and successful for atrioventricular node reentry tachycardia AVNRT with eccentric retrograde left-sided activation masquerading a tachycardia which look like as a tachycardia using left accessory pathway Methods and Results During a 7 years period from 2002 to 2008 865 consecutive patients underwent electrophysiological study In the group with atrioventricular node reentry tachycardia AVNRT there were 178 patients In the group with typical fast-slow AVNRT 162 pts there was concentric retrograde activation of the both atrium