近年来，见有从体表和食管无创伤性记录窦房结电位（ＳＮＰ）的报道，但由于技术上有一定难度，所测结果不尽相同且有争议。为此，我们采用自制三导心电微电位检测仪，其系统采样频率为２ｋＨｚ，时间常数为０．２ｓ，对人食管、体表和肢体窦房结电位进行同步信号叠加检测，并通过同步信号叠加对人食管和心内膜所记录的ＳＮＰ、犬食管和心外膜所记录的ＳＮＰ进行对比研究，证实经食管双极导联信号叠加能清晰准确地记录到ＳＮＰ，且重复性好。 In recent years, there have been reports of noninvasive recordings of sinoatrial node potential (SNP) from body surface and esophagus. However, due to technical difficulties, the measured results are not the same and controversial. To this end, we use self-made three-conductor ECG micro-potential detector, the system sampling frequency of 2kHz, time constant of 0.2s, the human esophagus, body surface and limb sinus node potential synchronization signal superimposed detection, and through synchronization Signal superposition of human esophageal and endocardial recorded SNP, dog esophageal and epicardium recorded SNP were compared to confirm the transesophageal bipolar lead signal superposition can be clearly and accurately recorded SNP, and good repeatability.