Measurement of body surface Laplacian ECG and its signal processing
Cao, Y.; Jin, S.; Chen, M.; Li, G.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 24(4): 768-771
2007
ISSN/ISBN: 1001-5515 PMID: 17899741 Document Number: 606298
Surface Laplacian of the body surface potential (Laplacian ECG--LECG) is a new approach to resolve spatially distributed bioelectrical source. In this paper, we discussed an LECG sensor which integrated triple concentric ring electrodes and signal adjustor on a printed board. The LECG is measured directly by this sensor. The frequency, amplitude and phase of the power line interference were detected by a nonlinear adaptive filter so that interference was eliminated. The wavelet shrinking technique was used to eliminate the rest of random noise. And we got the high quality LECG signal. It laid the foundation for heart disease diagnosis.