Comparison of Left Atrium and Premature Ventricular Contraction Mapping Using OCTARAY and OPTRELL Catheters.

Introduction: Multielectrode mapping catheters, such as the OCTARAY and OPTRELL, are essential in creating myocardial electroanatomical mapping in arrhythmias. However, only a few studies have compared their performance, and in this study, we addressed this gap in knowledge by comparing their performance in left atrial (LA) mapping during atrial fibrillation (AF) ablation and premature ventricular contraction (PVC) mapping.

Methods and results: Twenty patients (10 each for LA and 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, tissue proximity indication (TPI), 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. The mean voltage (0.192 mV [0.072, 0.48] vs. 0.126 mV [0.042, 0.378]; p = 0.001) and the percentage of TPI-positive electrodes (14.97% vs. 11.45%; p < 0.001) using the OPTRELL were significantly higher than those obtained using the OCTARAY. However, there were no significant differences in other LA parameters. In PVC mapping, catheter-induced PVCs using the OPTRELL were significantly fewer than when using the OCTARAY (100 [32, 337] vs. 247 [110, 745, p = 0.039), with fewer catheter induced PVCs per minute (15 [6, 23] vs. 35 [20, 71, p = 0.039). However, no significant differences were observed in other PVCs mapping parameters.

Conclusion: In LA mapping, the OPTRELL showed higher mean voltage and TPI positivity and in PVC mapping it showed fewer catheter-induced PVCs compared to those of the OCTARAY catheters.