Remote magnetic versus manual catheters: Evaluation of ablation effect in atrial fibrillation by myocardial marker levels

Abstract

Background: A remote magnetic navigation (MN) system is available for radiofrequency ablation of atrial fibrillation (AF), challenging the conventional manual ablation technique. The myocardial markers were measured to compare the effects of the two types of MN catheters with those of a manual-irrigated catheter in AF ablation. Methods: AF patients underwent an ablation procedure using either a conventional manual-irrigated catheter (CIR, n∈=∈65) or an MN system utilizing either an irrigated (RMI, n∈=∈23) or non-irrigated catheter (RMN, n∈=∈26). Levels of troponin T (TnT) and the cardiac isoform of creatin kinase (CKMB) were measured before and after ablation. Results: Mean procedure times and total ablation times were longer employing the remote magnetic system. In all groups, there were pronounced increases in markers of myocardial injury after ablation, demonstrating a significant correlation between total ablation time and post-ablation levels of TnT and CKMB (CIR r∈=∈0.61 and 0.53, p∈