Feasibility of open window mapping approach in accessory pathways ablation

Abstract

Abstract Funding Acknowledgements Type of funding sources: None. Introduction and Objectives We described a new protocol of open window mapping (OW) in accessory pathways (AP) in CARTO® 3 system. This protocol automatically mapping conventional electrophysiology criteria of AP diagnostic, as shorter local EGM AV interval (extended early meets late tool), earliest local activation time (LAT) and annotation at unipolar signal (wavefront annotation). Methods Single center, prospective and observational study of 17 consecutive patients underwent AP catheter ablation. Results Mapping was performed in anterograde conduction in 13 patients (76.5%), retrograde in 5 patients(29,4%) and orthodromic tachycardia in 2 patients (11,7%). Mean of numbers of points were 3092±2246, with 30min ± 13min of mapping. Ablation was effective in 17 patients( 100%) and RF time until complete AP elimination was 2.6s. Image 1 show representation of EEML tool, targeting shorter interval EGM AV or VA and color adjust to determine earliest LAT. Image 1 show representation of EEML tool, targeting shorter interval EGM AV or VA and color adjust to determine earliest LAT. Conclusions In our experience, automatically mapping of conventional electrophysiology criteria for AP diagnostic is able to localize AP insertion, suggesting an increasing in effectiveness of procedure, a reducing in mapping time, ablation time and X-ray exposure time.