Comparison of LA and PVC mapping using OCTARAY and OPTRELL catheters

BackgroundMultielectrode mapping catheters, such as the OCTARAY and OPTRELL, are essential in creating myocardial electroanatomical mapping in arrhythmias. The OCTARAY is a multi-spline mapping catheter with 48 closely spaced multielectrodes that enables high-resolution electroanatomical mapping, while the OPTRELL is a multi-electrode catheter with 36 electrodes arranged on eight radiating splines. However, only a few studies have compared their performance. In this study, we aimed to compare the OCTARAY and OPTRELL catheters in two areas: left atrial (LA) mapping during atrial fibrillation (AF) ablation; and premature ventricular contraction (PVC) mapping. MethodsTwenty patients (Ten patients for LA mapping and ten for PVC mapping) were enrolled. LA voltage mapping was performed twice, alternating between catheters post-AF ablation. Parameters compared included mapping time, mapping points, catheter-induced premature atrial contraction (PACs), tissue proximity indication, low voltage area, and fluoroscopy time. For PVC mapping, comparisons included mapping time, catheter-induced PVCs, earliest activation time measured from the onset of PVC QRS, earliest activation point, and fluoroscopy time. ResultsCompared with THE OCTARAY, mean voltage using the OPTRELL was higher (0.192 mV[0.072, 0.48] vs. 0.126 mV[0.042, 0.378]; P = .001) and the percentage of tissue proximity indication positive was also higher (14.97% vs. 11.45%; P < .001). However, there were no significant differences in low voltage area between the two groups (39.5 m2[16.5, 66.8] vs. 40[23.6, 61]; P = .861), and in other LA parameters. In PVC mapping, catheter-induced PVCs using OPTRELL were significantly fewer than the OCTARAY (100 [32, 337] vs. 247 [110, 745], P = .039), with fewer catheter induced PVCs per minute (15 [6, 23] vs. 35 [20, 71], P = .039). However, no significant differences were observed in other PVCs mapping parameters. ConclusionThe OPTRELL catheter demonstrated higher voltage recordings in LA mapping and fewer catheter-induced PVCs compared with the OCTARAY catheter. However, no significant difference was observed in other mapping parameters.