AV nodal tachycardia Atrioventricular reentrant tachycardia 2012-04-11T08:42:52Z UMLS:C4023220 Accessory pathway-related atrioventricular reentrant tachycardia (AVRT) involves an abnormal electrical conduction of the accessory pathway. The accessory pathway connecting impulses between the atrium and the ventricle can be seen at any site in the AV groove. HP:0011717 AV nodal reentry tachycardia