目的　Carto系统可进行电解剖标测 ,显示心腔三维解剖结构。本研究通过Carto系统与常规标测方法指导消融治疗特发性室性心动过速 (室速 )的比较 ,评价其临床应用价值。方法　 2 5例特发性室速患者 ,均未发现器质性心脏病。 10例应用Carto系统在相关心室标测 ,显示心室三维电激动图并指导消融 ,作为Carto组。另 15例在X线下常规标测和消融 ,作为常规方法组。比较两组的手术时间、曝光时间及放电次数、消融成功率、并发症和随访结果。结果　Carto组中有 6例左心室室速 ,4例右心室室速 ,均消融成功。常规方法组中 ,起源于左心室和右心室的室速分别为 9例和 6例 ,13例消融成功 ,成功率 87% ,1例右心室心尖部室速和 1例左心室室速不成功。Carto组与常规方法组相比较 ,手术时间无明显延长 [(10 6± 2 4)minvs (98± 19)min ,P >0 0 5 ],曝光时间缩短 [(10± 7)minvs(2 2± 15 )min ,P <0 0 1],放电次数减少 [(2± 2 )次vs(4± 5 )次 ,P <0 0 5 ]。两组均无并发症。随访 3～ 15个月 ,无复发病例。结论　本研究显示应用Carto系统标测和消融特发性室速安全有效 ,可实时三维重建心腔结构 ,附以电生理信息 ,较常规方法X线透视下定位准确可靠 ,明显缩短曝光时间 ,并通过其导航定位记忆功能 ,减少放电次数 Objective The Carto system can perform the electroanatomical mapping to show the three-dimensional anatomy of the heart chamber. In this study, the comparison between Carto system and routine mapping method for guiding the treatment of idiopathic ventricular tachycardia (VT) was conducted to evaluate its clinical value. Methods Twenty-five patients with idiopathic VT had no organic heart disease. 10 cases of Carto system using the relevant ventricular mapping, showing three-dimensional ventricular electrophysiogram and guide the ablation, as the Carto group. The other 15 patients under X-ray routine mapping and ablation, as a conventional method group. The operation time, exposure time and number of discharges, success rate of ablation, complications and follow-up results were compared between the two groups. Results In the Carto group, there were 6 cases of left ventricular tachycardia and 4 cases of right ventricular tachycardia, both of which were successfully ablated. In the conventional method group, ventricular tachycardia originated in the left ventricle and right ventricle were 9 and 6 cases, 13 cases ablation success, the success rate was 87%, 1 case of right ventricular apex and 1 case of left ventricular tachycardia unsuccessful. There was no significant difference between the Carto group and the conventional group (P <0.05). The time of operation was no significant increase in the Carto group [(10 6 ± 2 4) min vs (98 ± 19) min, P 0 05) ± 15) min, P <0 0 1]. The number of discharges decreased by (2 ± 2) vs (4 ± 5) times, P <0 05]. No complications in both groups. Follow-up 3 to 15 months, no recurrence. Conclusion This study shows that the Carto system can be used to detect and ablate idiopathic ventricular tachycardia safely and effectively. It can real-time reconstruct the cardiac cavity structure with electrophysiological information. Compared with the conventional method, X-ray fluoroscopy positioning is accurate and reliable, and the exposure time is significantly shortened. Through its navigation and positioning memory function, reduce the number of discharges