Comparison of voltage maps using OCTARAY catheter and PENTARAY catheter

Abstract Background Recently, a new OCTARAY ® mapping catheter was commercially launched. The catheter is designed to enable high‐density mapping and precise signal recording via 48 small electrodes arranged on eight radiating splines. The purpose of this study was to compare bipolar voltage and low‐voltage‐area size, and mapping efficacy between the OCTARAY catheter and the PENTARAY ® catheter Methods Twelve consecutive patients who underwent initial and second ablations for persistent atrial fibrillation within 2 years were considered for enrollment. Voltage mapping was performed twice, first during the initial ablation using the PENTARY catheter and second during the second ablation using the OCTARAY Long 3‐3‐3‐3‐3 (L3) catheter. Results Mean voltage with the OCTARAY‐L3 catheter (1.64 ± 0.57 mV) was 32.3% greater than that with the PENTARAY catheter (1.24 ± 0.46 mV, p < .0001) in total left atrium. Low‐voltage‐area (<0.50 mV) size with the OCTARAY‐L3 catheter was smaller than that with the PENTARAY catheter (6.9 ± 9.7 vs. 11.4 ± 13.0 cm 2 , p < .0001). The OCTARAY‐L3 catheter demonstrated greater efficacy than the PENTARAY catheter in terms of shorter mapping time (606 ± 99 vs. 782 ± 211 s, p = .008) and more mapping points (3,026 ± 838 vs. 781 ± 342 points, p < .0001). Conclusion The OCTARAY catheter demonstrated higher voltage recordings, narrower low‐voltage areas, and a more efficacious mapping procedure than the PENTARAY catheter.