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Abstract Objective To evaluate application of different mapping methods in radiofrequency ablation of atrial flutter (AF). Methods 22 patients with AF underwent ablation guided by quadripolar electrode catheter (8 cases, group A), Halo catheter (10 cases, group B) or Carto system(4 cases, group C) mapping, respectively. The success rate, procedure time,radiation exposure time and delivery time were compared between groups. Results The primary success rate was 100% in every group. The procedure time was (171.9 ± 25.6)min, (124 ± 24.3)min and (248.6 + 21.8)min, the radiation exposure time (70.9 ± 12.5)rain, (52.7 ± 14.6)min and (33.3± 7.5)rain, and the delivery time (701 ± 85)s, (562 ± 49)s and (521 ± 56)s,in group A, B and C, respectively. There was significantly different between groups (all P < 0.05). During a follow-up of 4-12 months, AF recurred in 2 cases in group A and one in group B. The 3 cases, two with atypical AF and one with typical AF, underwent successful ablation guided by Carto system mapping and had no relapse at 12-month follow-up.Conclusion The 3 mapping methods are reliable in guiding ablation of typical AF. Carto system is of benefit to ablation of atypical and recurred AF and obviously reduces radiation exposure time and delivery time.
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