Comparison of two methods for removing baseline wander in the ECG

Author

Gradwohl, Jake R. ; Pottala, Erik W. ; Horton, Martha R. ; Bailey, James J.

Author_Institution

Nat. Inst. of health, Bethesda, MD, USA

fYear

1988

fDate

25-28 Sep 1988

Firstpage

493

Lastpage

496

Abstract

The authors compare the cubic-spline method with multipole null-phase digital filters in their ability to correct for baseline wander on 69 ECG segments with both normal and abnormal rhythms. A single-pole 0.05-Hz filter was included in this study for comparison. A null-phase, 6-pole filter with a cutoff between 0.75 and 1.0 Hz can attenuate low-frequency noise (i.e. correct baseline) as well as the cubic spline. However, such a filter introduces minor changes in the original signal, especially in the presence of a long RR interval. The cubic spline is very dependent on the accurate determination of QRS onset. However, both perform better than the single-pole 0.05-Hz filter, which does very little to attenuate low-frequency noise

Keywords

electrocardiography; signal processing; 0.05 Hz; 0.75 to 1 Hz; ECG segments; LF noise; QRS onset determination; RR interval; abnormal ECG rhythm; baseline wander removal; cubic spline; multipole null-phase digital filters; normal ECG rhythm; null-phase 6-pole filter; Digital filters; Electrocardiography; Frequency; Low-frequency noise; Raw materials; Rhythm; Root mean square; Signal restoration; Spline; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology, 1988. Proceedings.

Conference_Location

Washington, DC

Print_ISBN

0-8186-1949-X

Type

conf

DOI

10.1109/CIC.1988.72668

Filename

72668