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

fYear

1997

fDate

4-6 Apr 1997

Firstpage

121

Lastpage

124

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Biomedical Engineering Conference, 1997., Proceedings of the 1997 Sixteenth Southern

Conference_Location

Biloxi, MS

ISSN

1086-4105

Print_ISBN

0-7803-3869-3

Type

conf

DOI

10.1109/SBEC.1997.583229

Filename

583229