Electroanatomical mapping-system guided vs. intracardiac echocardiography-guided slow pathway ablation: a randomized, single-center trial

Abstract Funding Acknowledgements Type of funding sources: None. Introduction Radiofrequency (RF) catheter ablation the slow pathway (SP) in atrioventricular nodal reentry tachycardia (AVNRT) is highly effective; however, it may require prolonged fluoroscopy and RF time. Procedural outcomes improve by using electroanatomical mapping systems (EAM), and/or intracardiac echocardiography (ICE). Purpose Our aim was to compare EAM-guided vs. ICE-guided approach for SP patients with AVNRT. Methods In our single-center study, 65 underwent due AVNRT were randomized or groups. (total procedure time, puncture-to-mapping mapping-to-last time), parameters radiation dose) data (number applications, total time) analyzed. Results ICE guidance reduced time (39.6±7.6 min 32.7±8.2 min; p< 0.001) (68.5 (62.8; 75.3) 59.5 (56;64) 0.001). Total shorter (0 (0;0) sec 79 (61; 121.5) sec; 0.001), dose lower mGy 3.1 (2.2; 4.5) mGy; 0,001) use EAM. No significant difference detected regarding (6 (2.5;17,0) 3 (2; 8.3) p= 0.13), number applications (5 (3; 7) 3.5 5.5); 0.30), energy (3625 (2513; 5402) J 2676 (1912.5; 5291.5) J; 0.10), however group (127.5 (86.8; 181) sec. 98.5 (81; 193.5) 0.04). complication occurred. Acute success rate 100% there no recurrence during follow up. Conclusions trial enrolled AVNRT, dose, procedural, as well longer compared group.