Service de Cardiologie, Centre Hospitalier Princesse Grace, Avenue Pasteur, Monaco.
Department of Cardiology, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium.
Europace. 2019 Jan 1;21(Supplement_1):i21-i26. doi: 10.1093/europace/euy182.
Successful catheter ablation of scar-related atrial tachycardia depends on correct identification of the critical isthmus. Often, this is a represented by a small bundle of viable conducting tissue within a low-voltage area. It's identification depends on the magnitude of the signal/noise ratio. Ultra-high density mapping, multipolar catheters with small (eventually unidirectional) and closely-spaced electrodes improves low-voltage electrogram detection. Background noise limitation is also of major importance for improving the signal/noise ratio. Electrophysiological properties of the critical isthmus and the characteristics of the local bipolar electrograms have been recently demonstrated as hallmarks of successful ablation sites in the setting of scar-related atrial tachycardia.
成功的瘢痕相关房性心动过速导管消融取决于对关键峡部的正确识别。通常，这是在低电压区域内的一小束有活力的传导组织表示。其识别取决于信号/噪声比的大小。超高密度标测、带有小（最终是单向的）和紧密间隔电极的多极导管提高了低电压电图的检测。背景噪声的限制对于提高信号/噪声比也很重要。关键峡部的电生理特性和局部双极电图的特征已被证明是瘢痕相关房性心动过速消融成功部位的特征。
