Comparative Study of Atrioventricular Node Reentrant and Atrioventricular Reentrant Tachycardia

【Objective】To evaluate the characteristics of atrioventricular node reentrant tachycardia(AVNRT) and atrioventricular reentrant tachycardia(AVRT) and the effects and safety of radiofrequency catheter ablation(RFCA).【Methods】The clinical and electrophysiological characteristics,success rate,recurrence and complications of RFCA in 823 patients with AVNRT and AVRT were analysed retrospectively.【Results】Among all the patients,AVRT were more than AVNRT,females were more than males in patients with AVNRT,but a male preponderance was seen in the AVRT group(P0.01).Left accessory pathway was more than right accessory pathway in patients with AVRT,there was concealed accessory pathway preponderance in the left accessory pathway group while a dominant accessory pathway preponderance was seen in patients with right accessory pathway(P0.01).There were more male than female patients with left accessory pathway,but females were more than males in patients with right accessory pathway(P0.01).The success rate in patients with right dominant accessory pathway was lower than that in patients with another accessory pathway and AVNRT(P0.01),but the recurrent rate in patients with right dominant accessory pathway was higher than that in patients with left accessory pathway(P0.05 and P0.01).The complications included 2 patients with complete atrioventricular block requiring permanent pacemaker implantation,6 patients with pneumothorax and haemothorax,1 patient with cardiac tamponade,3 patients with femoral pseudoaneurysm,1 patient with ventricular fibrillation,there was no mortality.【Conclusion】The success rate for AVNRT and AVRT is relative high,the recurrent rate and complications are quite lower,RFCA is a safe and effective method of treatment for patients with AVNRT and AVRT.