Freedom From Atrial Tachyarrhythmias After Catheter Ablation of Atrial Fibrillation by Martin R. Karch, Bernhard Zrenner, Isabel Deisenhofer, Jürgen Schreieck,

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Freedom From Atrial Tachyarrhythmias After Catheter Ablation of Atrial Fibrillation by Martin R. Karch, Bernhard Zrenner, Isabel Deisenhofer, Jürgen Schreieck, Gjin Ndrepepa, Jun Dong, Katrin Lamprecht, Petra Barthel, Etienne Luciani, Albert Schömig, and Claus Schmitt Circulation Volume 111(22):2875-2880 June 7, 2005 Copyright © American Heart Association, Inc. All rights reserved.

Figure 1. Voltage map of patient treated with circumferential pulmonary vein ablation (posterior view). Figure 1. Voltage map of patient treated with circumferential pulmonary vein ablation (posterior view). Red represents lowest-voltage areas, and purple represents highest-voltage areas. Red circles show ablation lines around pulmonary vein ostia. Areas within the ablation lines show very low voltage compared with remaining left atrium. Martin R. Karch et al. Circulation. 2005;111:2875-2880 Copyright © American Heart Association, Inc. All rights reserved.

Figure 2. Disappearance of pulmonary vein potentials during segmental pulmonary vein ablation. Figure 2. Disappearance of pulmonary vein potentials during segmental pulmonary vein ablation. Filled arrows indicate sharp potentials recorded at ostium of left superior pulmonary vein by a decapolar Lasso catheter. Pulmonary vein angiography via a multipurpose catheter placed within the vein demonstrates correct placement of Lasso catheter at ostium. During radiofrequency ablation delivery at ostium (catheter not shown), pulmonary vein potentials disappeared (empty arrow). CS indicates coronary sinus catheter; MAP, bipolar signals from quadripolar mapping and ablation catheter; and PV, bipolar signals from Lasso catheter. Martin R. Karch et al. Circulation. 2005;111:2875-2880 Copyright © American Heart Association, Inc. All rights reserved.

Figure 3. Kaplan-Meier estimates of arrhythmia symptom–free survival after circumferential pulmonary vein (PV) ablation (dashed line) and segmental pulmonary vein ablation (solid line). Figure 3. Kaplan-Meier estimates of arrhythmia symptom–free survival after circumferential pulmonary vein (PV) ablation (dashed line) and segmental pulmonary vein ablation (solid line). Martin R. Karch et al. Circulation. 2005;111:2875-2880 Copyright © American Heart Association, Inc. All rights reserved.