Left atrial voltage mapping with a direction‐independent grid catheter: Comparison with a conventional circular mapping catheter

• DOI: 10.1111/jce.14263
• Publication Date: 2019-11-08T04:15:27Z
• Authors: Masaharu Masuda; Mitsutoshi Asai; Osamu Iida; Shin Okamoto; Takayuki Ishihara; Kiyonori Nanto; Takashi Kanda; Takuya Tsujimura; Yasuhiro Matsuda; Shota Okuno; Yosuke Hata; Toshiaki Mano
• Keywords: Male; Cardiac Catheterization; Action Potentials; Equipment Design; Middle Aged; Cardiac Catheters; 03 medical and health sciences; 0302 clinical medicine; Heart Rate; Predictive Value of Tests; Pulmonary Veins; Recurrence; Atrial Fibrillation; Catheter Ablation; Humans; Atrial Function, Left; Female; Electrophysiologic Techniques, Cardiac; Aged

A recently introduced grid mapping catheter (GMC) is designed for better electrode-tissue contact and can collect bipolar signals both along across the splines, which may allow more efficient voltage map generation independent of propagation direction. We compared GMC with a conventional circular (CMC) left atrial (LA) mapping.This study included 20 consecutive patients undergoing repeat ablation recurrent fibrillation who had demonstrated LA low-voltage areas (LVAs, <0.10 mV). Following pulmonary vein isolation, was performed twice, once using CMC.Voltage than CMC in terms time (459 [404, 543] vs 602 [496, 814] seconds; P = .014) number points (2446 [2099, 3104] 1841 [1494, 2314]; .002). The incidence catheter-induced ectopies lower (44 [28, 62] 114 [74, 188]; < .0001) GMC. utilizing all bipoles detected LVAs 85% by CMC. LVA measurements were significantly smaller on maps generated or splines those measured (11.1 [4.6, 17.2] 9.7 [2.5, 16.0] 16.4 [6.8, 26.8] cm2 ; .008 .001, respectively), even when (7.9 [1.1, 13.5] , .0001).The allowed procedure enabled selective identification size.