Title :
Laplacian electrocardiograms with active electrodes for arrhythmia detection
Author :
Lu, C.C. ; Feng, W.Y. ; Tarjan, P.P.
Author_Institution :
Dept. of Biomed. Eng., Miami Univ., Coral Gables, FL, USA
fDate :
30 Oct-2 Nov 1997
Abstract :
Laplacian electrocardiogram (LECG) locates the moment of activation (MOA) at an electrode site from the surface of the chest. A tripolar concentric ring sensor provides a small but well-defined localized signal. The instrumentation amplifier (IA) mounted above the sensor is powered by two on-board lithium batteries. Combining the common mode rejection (CMR) of the tripolar concentric ring sensor and the high common mode rejection ratio (CMRR) of the IA, the LECG signal can be obtained with a good signal to noise ratio (SNR) in real time. Different MOA were observed for each of the 16 sites for each subject. Beat to beat time shift changes were observed at the same site in one subject with bigeminal rhythm. Normal sinus rhythm (NSR) time delay pattern can be used to compare with abnormal ones. Fast arrhythmia classification can be achieved in real time without digital signal processing
Keywords :
Laplace transforms; biomedical electrodes; electrocardiography; instrumentation amplifiers; medical signal detection; medical signal processing; Laplacian electrocardiograms; Li; active electrodes; arrhythmia detection; bigeminal rhythm; common mode rejection; electrode site moment of activation; electrodiagnostics; fast real time arrhythmia classification; high common mode rejection ratio; normal sinus rhythm time delay pattern; on-board lithium batteries; real time signal analysis; tripolar concentric ring sensor; Batteries; Delay effects; Digital signal processing; Electrodes; Instruments; Laplace equations; Lithium; Power amplifiers; Rhythm; Signal to noise ratio;
Conference_Titel :
Engineering in Medicine and Biology Society, 1997. Proceedings of the 19th Annual International Conference of the IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-4262-3
DOI :
10.1109/IEMBS.1997.754551
