Comparative study of electroanatomical and conventional fluoroscopic mapping and radiofrequency ablation for atrial tachycardia

ObjectiveTo assess the clinical benefits of Carto system mapping and conventional fluoroscopic mapping and radiofrequency ablation for atrial tachycardia (AT). MethodsA total of 61 patients [mean age,(42.5±19.1)years]with AT underwent in electrophysiologic mapping and radiofrequency ablation.The success rate,fluoroscopic time,operation time and radiofrequency discharge times were compared between Carto group and conventional group. ResultsTwenty-six cases with AT in conventional group (n=30) had instantaneous successful ablation.In Carto group (n=31),there were 30 cases with AT had instantaneous successful ablation. There were 49 focal AT and 12 cases with macroreentrant (45 cases in right atrium,16 cases in left atrium) AT.Three of 4 cases of AT with unsuccessful ablation in conventional group underwent another successful ablation under the guide of Carto system mapping.Comparing the Carto group and conventional group,the fluoroscopic time was shorter [(12.5±6.5)min vs (27.6±13.7)min,P=0.001].No complication occurred in both groups.After follow up of 8-36 months,1 patient with AT in left atrium in Carto group and 3 patients with AT in conventional group recurred underwent another successful ablation. ConclusionsThis study suggests that Carto system mapping and radiofrequency ablation for AT gains an advantage over conventional mapping, especially apparent in some patients with macroreentrant AT and other AT(in para-His bundle and in left atrium) and in the decrease of fluoroscopic time and increase successful rate.