A way of mapping and ablation with single ablation catheter on the patients with right atrial tachycardia

Objective To study the method of mapping and ablation with single ablation catheter on the patients with right atrial tachycardia (AT).Methods 26 patients with right atrial tachycardia were put into two groups at random,who were ready to have radiofrequency catheter ablation (RFCA).12 cases in group A were mapped and ablated with double ablation catheter.The rest 14 patients in group B were treated with single ablation catheter.in group B,we first mapped the right atrial roughly with high right atrial catheter (HRA) to determine the approximate site of AT.After the AT were brought out,And then we put the temperatureconteol ablation catheter to that site though right femoral vein.Mapped carefull in 1-2cm around the earlier mapping site and took the earliest A wave as the target site,where the A wave on ablation catheter was negative.Radiofrequency energy was delivered (15-30W) at 60°C if AT could be stopped within 10 seconds.if not,mapped and ablated around the site again till AT could not be brought out during injection isoproperenol intravenously.Results Both of the two groups were ablated successfully.There was no significant difference in operation time and the recurrence rate in follow up (P0.05).Conclusions Mapping with single ablation catheter is as efficient as with double ablation catheter,while the former is easier to practice.