Title :
Laplacian electrocardiograms with active electrodes
Author :
Lu, C.C. ; Plourdé, R. ; Fang, W.Y. ; Uhlhorn, S. ; Tarjan, P.P.
Author_Institution :
Dept. of Biomed. Eng., Miami Univ., Coral Gables, FL, USA
Abstract :
Laplacian electrocardiograms (ECG) were acquired with excellent signal to noise ratio (SNR). The signal locates the moment of activation (MOA) at an electrode site from the surface of the chest. A tripolar concentric ring electrode provides a small but well-defined localized signal with high common mode rejection (CMR). The active amplifier mounted on the electrode is powered by two on-board lithium batteries. The amplifier has high CMR ratio (CMRR) and 10 GΩ input impedance. Frequency response is from 5 Hz to 500 Hz. Time shift changes were observed in one subject with bigeminal rhythm
Keywords :
Laplace transforms; electrocardiography; medical signal processing; pattern classification; signal detection; 5 to 500 Hz; Laplacian electrocardiograms; Li; active amplifier; active electrodes; bigeminal rhythm; chest surface; electrode site; frequency response; high CMR ratio; high common mode rejection; input impedance; moment of activation; signal to noise ratio; time shift changes; tripolar concentric ring electrode; two on-board Li batteries; Batteries; Electrocardiography; Electrodes; Frequency response; Laplace equations; Lithium; Power amplifiers; Rhythm; Signal to noise ratio; Surface impedance;
Conference_Titel :
Biomedical Engineering Conference, 1997., Proceedings of the 1997 Sixteenth Southern
Conference_Location :
Biloxi, MS
Print_ISBN :
0-7803-3869-3
DOI :
10.1109/SBEC.1997.583229
