Comparison of Voltage Maps Using OCTARAY Catheter and PENTARAY Catheter.

Background: Recently, a new OCTARAY (R) 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 (R) catheterMethods: 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.