Double Potential Mapping: Development of a novel method to verify conduction block

使用跨越消融线的双极电极的双电位标测可以在不构建激活图的情况下将不完全消融的位置识别为传导间隙。在起搏过程中，使用11个定制的双极电极记录了7只犬的双极心电图，这些电极横跨双极射频消融器在右心房外侧形成的消融线上。用45个不同的双极电极同时标测右心房外侧，建立起激活图，确定消融线上最早的激活点。双电位标测在不显示任何地图的基础上实时定位传导间隙。双电位标测在消融后不同时间和不同起搏周期长度之间的准确性没有显著变化，双电位标测可以实时定位传导间隙，在非体外循环心脏不停跳心外膜消融中将是有用的。

Double potential mapping using bipolar electrodes that straddle the ablation line should identify the site of incomplete ablation as a conduction gap without constructing the activation maps.Bipolar electrograms were recorded during pacing using 11 custom-made bipolar electrodes straddling the ablation line created by a bipolar radiofrequency ablation device on the lateral right atrium in seven canines. The lateral right atrium was mapped simultaneously with 45 different bipolar electrodes to construct the activation maps and the earliest activation site across the ablation line was determined. The double potential mapping located the conduction gap on a real-time basis without displaying any maps. There was no significant change in the accuracy between the different times after ablation and different pacing cycle lengths.Double potential mapping locates the conduction gap on a real-time basis and would be useful in beating-heart epicardial ablation in off-pump setting.