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目的：探讨ST导管在持续房颤射频消融中的应用效果。方法以我院2014年3要12月期间所收治68例持续房颤患者作为研究对象，分为两组。均应行射频消融术进行治疗，对照组应用普通盐水灌注导管，观察组应用ST管，比较两组消融时间、透视时间、并发症发生率及随访期间复发率。结果观察组消融时间、透视时间为（152.4±13.5）min、（37.2±9.2）min，差异有统计学意义（P<0.05）。观察组并发症发生率为5.8%，复发率为11.8%，对照组为23.5%、29.4%，观察组均显著低于对照组，差异有统计学意义（P<0.05）。结论ST导管在持续房颤射频消融中的应用利于术者更好掌握导管与心房壁贴靠度，有效降低并发症发生率与复发率，缩短术中消融时间与透视时间，具有较高临床应用价值。“,”Objective To observe the curative effect of ST catheter applicated in radiofrequency ablation treating for sustained atri-al fibrillation. Methods 68 cases patients with continuous atrial fibrillation treated in our hospital during March 2014-December 2014 were selected as the research object and divided them into two groups. All the patients were given radiofrequency ablation treatment with control group(n=34) by normal saline irrigation catheter and observation group(n=34) by ST catheter. Ablation time, perspective time, complications and recurrence during the follow-up period of the two groups were compared. Results The ablation time of the observation and the control group was (152.4+13.5) min vs (117.3±17.5)min; the perspective time of the observation and the contral group was (37.2+9.2) min vs (25.4±7.0)min, and the differences between two groups were statistically significant (P<0.05).The complication rate and recurrence rate of the observation group ,5.8%and 11.8%, respectively, were significantly low-er than those of the control group ,23.5%and 29.4%, respectively, and the differences were statistically significant (P<0.05). Con-clusion The application of ST catheter in radiofrequency ablation in the persistent atrial fibrillation is conducive to the operator to grasp the catheter with atrial wall abutting scale, and can effectively reduce the incidence of complications and the recurrence rate, shorten the intraoperative melting time and the perspective of time, so it has high clinical value.