Title :
Cardiac Rhythm Detection and Classification by WOLAFilterbank Analysis of EGM Signals
Author :
Sheikhzadeh, Hamid ; Brennan, Robert L. ; So, Simon
Author_Institution :
AMI Semicond. Canada Co., Waterloo, Ont.
fDate :
Aug. 30 2006-Sept. 3 2006
Abstract :
A method of cardiac rhythm detection based on time-frequency analysis provided by a weighted overlap-add (WOLA) oversampled filterbank is proposed. Cardiac rhythms obtained from intracardiac electrogram signals are decomposed into the time-frequency domain and analyzed by parallel peak detectors in selected frequency subbands. Based on the coherence (synchrony) of the subband peaks, an optimal peak sequence representing the beat locations is obtained. By analyzing the synchrony of the subband beats and the periodicity and regularity of the optimal beat, the electrogram segment is classified into various possible classes including fibrillation, flutter, and tachycardia. This multi-tier method is evaluated using Ann Arbor Electrogram library in clean and in additive noise. The presented results show that in clean and in 15 dB SNR noise, the method never misses fibrillation or flutter. Other misclassification errors were within the acceptable limits
Keywords :
electrocardiography; filtering theory; medical signal detection; medical signal processing; signal classification; signal denoising; time-frequency analysis; 15 dB; Ann Arbor Electrogram library; SNR noise; additive noise; cardiac rhythm classification; cardiac rhythm detection; fibrillation; flutter; intracardiac electrogram signals; misclassification errors; multitier method; parallel peak detectors; signal coherence; subband heart beat synchrony; tachycardia; time-frequency analysis; weighted overlap-add oversampled filterbank analysis; Additive noise; Electrocardiography; Event detection; Filter bank; Frequency synchronization; Narrowband; Rhythm; Signal analysis; Time frequency analysis; Wideband;
Conference_Titel :
Engineering in Medicine and Biology Society, 2006. EMBS '06. 28th Annual International Conference of the IEEE
Conference_Location :
New York, NY
Print_ISBN :
1-4244-0032-5
Electronic_ISBN :
1557-170X
DOI :
10.1109/IEMBS.2006.260231