Clinical Experience With a Novel Multielectrode Basket Catheter in Right Atrial Tachycardias

C. Schmitt, B. Zrenner, M. Schneider, M. Karch, G. Ndrepepa, I. Deisenhofer, S. Weyerbrock, J. Schreieck, A. Schomig
1999 Circulation  
Background-The complexity of atrial tachycardias (ATs) makes the electroanatomic characterization of the arrhythmogenic substrate difficult with conventional mapping techniques. The aim of our study was to evaluate possible advantages of a novel multielectrode basket catheter (MBC) in patients with AT. Methods and Results-In 31 patients with AT, an MBC composed of 64 electrodes was deployed in the right atrium (RA). The possibility of deployment, spatial relations between MBC and RA, MBC
more » ... and RA, MBC recording and pacing capabilities, mapping performance, and MBC-guided ablation were assessed. MBC deployment was possible in all 31 patients. The MBC was left in the RA for 175Ϯ44 minutes. Stable bipolar electrograms were recorded in 88Ϯ4% of electrodes. Pacing from bipoles was possible in 64Ϯ5% of electrode pairs. The earliest activity intervals, in relation to P-wave onset, measured from the MBC and standard roving catheters were 41Ϯ9 and 46Ϯ6 ms, respectively (Pϭ0.21). Radiofrequency ablation was successful in 15 (94%) of 16 patients in whom it was attempted, including 2 patients with polymorphic right atrial tachycardia (RAT), 2 with RAT-atrial flutter combination, 1 with macroreentrant AT, and 1 with focal origin of atrial fibrillation. Conclusions-These data demonstrate that MBC can be used safely in patients with right atrial arrhythmias. The simultaneous multielectrode mapping aids in the rapid identification of sites of origin of the AT and facilitates radiofrequency ablation procedures. The technique is especially effective for complex atrial arrhythmias. (Circulation. 1999;99:2414-2422.)
doi:10.1161/01.cir.99.18.2414 pmid:10318663 fatcat:nzabfshoszebddlimfsjunvm2y