Objective To discuss theclinical effect and security of radiofrequence catheter ablation around the ostium sinuscoronary on those who suffered from atrial ventricular nodal reentrytachycardia(AVNRT).

• 目的依据房室结折返性心动过速(AVNRT)患者冠状窦口向上扩张的研究结果，进一步探讨于冠状窦口周围射频消融治疗AVNRT的临床效果和安全性。