Avnrt - AV Nodal Reentrant Tachycardia (AVNRT)- Case Study

AV Nodal Reentrant Tachycardia (AVNRT) is an arrhythmia caused by dual AV nodal pathways (one slow and one fast conduction route that enters the AV node). The fast tract has rapid conduction speeds with a longer refractory period, while the slow tract has slower conduction speeds with a shorter refractory period. During sinus rhythm, both pathways are activated, but the fast pathway makes it through the AV node quicker, activating the His bundle and simultaneously retrogradely entering the slow pathway, preventing it from having any further effect (Figure 1).