POSTERIOR ISTHMUS LINER RADIOFREQUENCY CATHETER ABLATION OF TYPICAL ATRIAL FLUTTER

Objective:Typical atrial flutter(AFL) was treated by posterior isthmus liner radiofrequency catheter ablation(RFCA) technique.Methods:23 patients diagnosed as having typical AFL were included in this study.The posterior isthmus between inferior vena cava and tricuspid valve annulus was the ablation target.Results:RFCA end point was posterior isthmus double direction block and no clinical flutter could be induced by programmed or burst stimulates with isoproterenol.All patients have got the end point and instant success rate was 100%.Only one case suffered recurrence in 6～34 weeks' follow-up and was successfully ablated in the second procedure.No complication was observed.Conclusions:Posterior isthmus liner RFCA was an effective and safe way in treating typical AFL.Isthmus double direction block and no flutter could be induced by programmed or burst stimulates with isoproterenol were trustworthy procedure end point.