AIM:To analyse the relationship between atrioventricular block (AVB) and target selecting when and after the radiofrequency catheter ablation(RFCA) treatment of atrial ventricular nodal reentry tachycardia(AVNRT)patients.

• 目的 :分析房室结折返性心动过速 (AVNRT)患者射频消融术 (RFCA)术中、术后发生房室传导阻滞 (AVB)与靶点选择的关系 ,以探讨选择消融靶点的安全性。