Correlation Analysis Of The "Jump" Interval Of Atrioventricular Nodal And The Distance Between The Successful Ablation Target And His Bundle In Patients With AVNRT Under Three-dimensional Mapping System

Objective:To observe the relationship of the “jump” interval when atrioventricular nodal reentrant tachycardia(AVNRT)was induced and the distance between the successful ablation target and his bundle when radiofrequency catheter ablation(RFCA)under three-dimensional mapping system.Methods:The clinical data of 98 patients with S-F AVNRT who were confirmed by the invasive electrophysiology examination received RFCA under three-dimensional mapping system(CARTO 3),marked the successful target、standard His bundle and the smallest His bundle under three-dimensional mapping system,measured the distance(Distance A)between the successful target and standard His bundle,the distance(Distance a)between the successful target and the smallest His bundle,respectively.To observe the relationship of the “jump” interval(Interval A)when AVNRT was induced without isoproterenol and the distance(Distance A1)between the successful target and standard His bundle,and the distance(Distance a1)between the successful target and the smallest His bundle,respectively;the relationship of the “jump” interval(Interval a)when AVNRT was induced with isoproterenol and the distance(Distance A2)between the successful target and standard His bundle,and the distance(Distance a2)between the successful target and the smallest His bundle,respectively.Results:65 patients were induced S-F AVNRT without isoproterenol,one of them couldn’t been recorded the site of standard His bundle.There were 64 patients whose relevant “jump” interval(Interval A1)between the slow pathway and the fast pathway by the invasive electrophysiology examination was(121.16±55.59ms),the distance(Distance A1)between the standard His bundle and the successful target when RFCA was(13.56±5.06mm),The correlation index between the Interval A1 and Distance A1 was r=0.091,P=0.473,there was no correlation between them.The distance(Distance a1)between the smallest His bundle and the successful target in 65 patients was(10.19±4.34mm),65 patients whose relevant “jump” interval(Interval A2)between the slow pathway and the fast pathway by the invasive electrophysiology examination was(120.76±55.24ms),The correlation index between the Interval A2 and Distance a1 was r=0.035,P=0.784,there was no correlation between them.33 patients were induced S-F AVNRT with isoproterenol,one of them couldn’t been recorded the site of standard His bundle.There were 32 patients whose relevant “jump” interval(Interval a1)between the slow pathway and the fast pathway by the invasive electrophysiology examination was(118.70±48.79ms),the distance(Distance A2)between the standard His bundle and the successful target when RFCA was(12.43±3.70mm),The correlation index between the Interval A2 and Distance a1 was r=0.080,P=0.665,there was no correlation between them.The distance(Distance a2)between the smallest His bundle and the successful target when RFCA in 33 patients was(9.80±3.67mm),33 patients whose relevant “jump” interval(Interval a2)between the slow pathway and the fast pathway by the invasive electrophysiology examination was(119.72±43.50ms),The correlation index between the Interval a2 and Distance a2 was r=0.314,P=0.076,there was no correlation between them.Conclusions:There was no relationship in the “jump” interval of atrioventricular nodal reentrant tachycardia and the distance between the successful ablation target and standard His bundle in patients with AVNRT under three-dimensional mapping system(CARTO 3)whichever with or without infusion of isoproterenol.