Document Detail

Suppression of baseline wander in the ECG using a bilinearly transformed, null-phase filter.
MedLine Citation:
PMID:  2614308     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to design and test a bilinearly transformed, null-phase (BLT/NP) filter for removing baseline wander and to compare it with the cubic spline for performance. For this purpose, the ECG data were filtered to remove high-frequency noise and low-frequency baseline wander to form a set of "clean" ECGs. Artificial low-frequency noise mimicking typical baseline wander was constructed from sine and cosine waves at 0.20 and 0.45 Hz and with amplitudes of 400 and 300 microV, respectively, and added to the "clean" ECGs to form the "test" ECGs. The BLT/NP filter and the cubic spline method each were applied to a "test" ECG to form a "restored" ECG. The measure of performance was the root mean square difference (RMSD) between the "restored" ECG and the initial "clean" ECG. RMSD values showed that on the average the BLT/NP filter performed as well as the cubic spline method and has the advantage that accurate determination of the QRS onset is not required.
E W Pottala; J J Bailey; M R Horton; J R Gradwohl
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of electrocardiology     Volume:  22 Suppl     ISSN:  0022-0736     ISO Abbreviation:  J Electrocardiol     Publication Date:  1989  
Date Detail:
Created Date:  1990-03-15     Completed Date:  1990-03-15     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0153605     Medline TA:  J Electrocardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  243-7     Citation Subset:  IM    
Laboratory of Applied Studies, DCRT, Bethesda, MD 20892.
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MeSH Terms
Signal Processing, Computer-Assisted*
Software Design

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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