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

双电位标测使用跨在消融线上的双极电极，应将不完全消融的部位识别为传导间隙，而无需构建激动map.Biopolar电描记图，在起搏过程中使用11个定制的双极电极，跨在由双极射频消融装置在7只犬的右心房外侧创建的消融线上。用45个不同的双极电极同时标测右心房外侧以构建激动标测图，并确定穿过消融线的最早激动部位。双电位标测在不显示任何标测图的情况下实时定位传导间隙。消融后不同时间和不同起搏周期的准确性无明显变化，双电位标测可实时定位传导间隙，在非体外循环心脏不停跳心外膜消融中有一定的应用价值。

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.