右心室流出道室性早搏射频消融治疗的有效性和安全性评价

目的评价应用Carto系统射频消融治疗右心室流出道起源性室性早搏（室早）有效性和安全性。方法选择2005年5月至2007年12月临床治疗的47例室早患者，其中男性21例，女性26例，平均年龄（34．5±19．2）岁，病程3～38个月。射频所用能量为40W，时间为120～240s，温度设定为60℃。分别在消融术前和术后1、3和12个月进行动态心电图检查。结果47例中成功45例，有效率为95．8％。2例1年后复发新的早搏，未发现任何并发症。结论应用Carto系统对右心室流出道起源性室早经射频消融治疗是有效和安全的。

Efficacy and safety of radiofrequency catheter ablation of premature ventricular contractions origina ting from the right ventricular outflow tract

Objective To assess efficacy and safety in patients with right ventricular outflow tract (RVOT) arrhythmias treated with radiofrequency catheter ablation (RFCA) combined with electro-anatomical mapping system (Carto). Methods The study group consisted of 47 consecutive patients (mean age 34. 5 ± 19.2 years,range 18～61 years,21 males,26 females) with symptomatic arrhythmias originating from RVOT, who underwent RFCA between Oct. 2005 and Dec. 2007. RFCA was performed with the use of the Carto system. The power of RF current was set at 40 Watts,duration 120～240 seconds,and maximal temperature 60 degrees C. In order to assess RFCA efficacy,a 24-hour Holter ECG monitoring was performed before RFCA and shortly after the procedure as well as one, three and twelve months afterwards. Results Holter ECG monitoring after RFCA showed that the procedure was successful in 45 (95. 8%) patients. In the remaining two patients no sig nificant reduction in the frequency of ventricular ectopy was noted,however,no complex ventricular arrhythmias were observed. None of the complications were observed. Conclusion RFCA with the use of the Carto system is effective and safe in the treatment of arrhythmias originating from RVOT.