Electrophysiological characterization in atrioventricular nodal reentrant tachycardia with non-jumping atrioventricular nodal functional curves

Objective:To suggest the electrophysiological characterization in atrioventricular nodal reentrant tachycardia (AVNRT) with non-jumping atrioventricular nodal functional curves(AVNFC). Method: Seventy-five patients with AVNRT were divided into 3 groups.Group A(n=16):patients with no-jumping AVNFC during atrial incremental pacing and A 1A 2 extrastimu1ations.Group B(n=10):patients with jumping AVNFC during atrial incremental pacing.Group C(n=49):patients with jumping AVNFC during atrial incremental pacing and A 1A 2 extrastimu1ations. Electrophysiological parameters were compared between the groups before and after ablation. Result: The A 1H 1max were shortened obviously in the three groups after ablation (P 0.05) .In Group A, the A 1H 1max before ablation and extent of shortening in A 1H 1max after ablation were shorter than those in Group B and Group C(P 0.05). The inducing rate of untypical AVNRT in Group A was higher than those in Group B and Group C. Conclusion:The shortening of A 1H 1max can be determined as an indicator for the endpoint of radiofrequency ablation in AVNRT patients with non-jumping AVNFC during atrial incremental pacing and A 1A 2 extrastimu1ations.The untypical AVNRT correlate with no-jumping AVNFC.