To investigate the change of atrioventricular conduction function after slow-pathway modification by selective radiofrequency catheter ablation

Objective: To compare the differences of atrioventricular conduction function before and after slow pathway modification by Radiofrequency catheter ablation(RFCA).Methods: 86 cases were diagnosed dual atrioventricular node pathways with slow-fast type atrioventricular node reentry tachycardia.Electrophysiologic parameters were recorded before and after slow pathway modification by radiofrequency catheter ablation(RFCA): Atrial effecter refractory periodicity(A-ERP),AV node Wenckebach(AVN-WKB),Atrioventricular node effecter refractory period-fast pathway(ERP-FP),Heart Rate(HR),PR-interval.Results: HR increased quickly,PR-interval,AVN-WKB and ERP-FP shortened post ablation.There was no significant difference in Atrial ERP(P0.05),but significant differences in ERP-FP, AVN-WKB and HR(P0.05) pre and post ablation.Conclusion: The conduction function of fast pathway can be improved after slow pathway modification by RFCA.It prompts slow pathway to influence fast pathway in a certain extent,and they are closely connected with each other.