Selective elimination of retrograde conduction by intraoperative neodymium: YAG laser photocoagulation in dogs

Abstract

1) With limited laser photocoagulation of the proximal AV node area, VA conduction can be eliminated and anterograde AV node transmission maintained. 2) Destruction of the atrial approaches on the right side with preservation of the compact part of the AV node may result in unidirectional retrograde block.

Monitoring of laser effects on the conduction system by using an open-irrigated electrode-laser mapping and ablation catheter: laser catheter mapping

“…15,16 Even catheter techniques for laser ablation of the AV conduction from the aortic root and selective elimination of retrograde AV conduction were reported. 17,18 Various catheter designs were used for laser applications, including anterograde or with a lateral laser beam, perpendicular to the long axis of the catheter. 19 However, in none of the studies, we found focused electrograms in which a gradual attenuation of local PA is displayed or is mentioned as a useful sign for the control of lesion growth during energy application.…”