Coherence as a measure of noise in the ECG

Research output: Contribution to journal › Conference article › Research › peer-review

Standard

Coherence as a measure of noise in the ECG. / Struijk, Johmmes J.; Graff, Claus; Kanters, Jørgen K.; Xue, Joel Q.; Jensen, Ask Schou; Schmidt, Samuel.

In: Computing in Cardiology, Vol. 41, 01.01.2014, p. 37-40.

Research output: Contribution to journal › Conference article › Research › peer-review

Harvard

Struijk, JJ, Graff, C, Kanters, JK, Xue, JQ, Jensen, AS & Schmidt, S 2014, 'Coherence as a measure of noise in the ECG', Computing in Cardiology, vol. 41, pp. 37-40. <https://ieeexplore.ieee.org/document/7042973>

APA

Struijk, J. J., Graff, C., Kanters, J. K., Xue, J. Q., Jensen, A. S., & Schmidt, S. (2014). Coherence as a measure of noise in the ECG. Computing in Cardiology, 41, 37-40. https://ieeexplore.ieee.org/document/7042973

Vancouver

Struijk JJ, Graff C, Kanters JK, Xue JQ, Jensen AS, Schmidt S. Coherence as a measure of noise in the ECG. Computing in Cardiology. 2014 Jan 1;41:37-40.

Author

Struijk, Johmmes J. ; Graff, Claus ; Kanters, Jørgen K. ; Xue, Joel Q. ; Jensen, Ask Schou ; Schmidt, Samuel. / Coherence as a measure of noise in the ECG. In: Computing in Cardiology. 2014 ; Vol. 41. pp. 37-40.

Bibtex

@inproceedings{43567c5b21704f29a5cdc26e777db890,
title = "Coherence as a measure of noise in the ECG",
abstract = "The 12-lead ECG can be described as the projection of a time-varying dipole on the lead vectors. This dipole-source assumption implies that the different leads must show a high coherence and that deviations from values close to unity may indicate the presence of noise. We evaluated the average coherence in the band of 5 Hz to 45 Hz in 309 ECGs and compared the coherence measure with an automatic out-of-band noise evaluation, quantified at a scale from 0 (clean) to 10 (very noisy). The generalized magnitude squared coherence (GMSC), which is a global measure of the linear relationships among the leads, was used. A high coherence (GMSC> 0. 95) was always associated with very low noise (level 0 or 1) and 0.9<GMSC<0.95 was associated with levels 0-2. For noise levels > 2 the GMSC was <0.87 in all cases. There were no cases of high noise level and a high coherence, however, in 32% of the cases with noise level 0 or 1 the GMSC was <0.8. For low-noise ECGs the GMSC is close to unity, with a good correlation between noise level and GMSC for normal ECGs. However, a low coherence also seems to be associated with abnormalities in the ECG, which will be subject for further study.",
author = "Struijk, {Johmmes J.} and Claus Graff and Kanters, {J{\o}rgen K.} and Xue, {Joel Q.} and Jensen, {Ask Schou} and Samuel Schmidt",
year = "2014",
month = jan,
day = "1",
language = "English",
volume = "41",
pages = "37--40",
journal = "Computing in Cardiology",
issn = "0276-6574",
publisher = "IEEE Computer Society Press",
note = "41st Computing in Cardiology Conference, CinC 2014 ; Conference date: 07-09-2014 Through 10-09-2014",

}

RIS

TY - GEN

T1 - Coherence as a measure of noise in the ECG

AU - Struijk, Johmmes J.

AU - Graff, Claus

AU - Kanters, Jørgen K.

AU - Xue, Joel Q.

AU - Jensen, Ask Schou

AU - Schmidt, Samuel

PY - 2014/1/1

Y1 - 2014/1/1

N2 - The 12-lead ECG can be described as the projection of a time-varying dipole on the lead vectors. This dipole-source assumption implies that the different leads must show a high coherence and that deviations from values close to unity may indicate the presence of noise. We evaluated the average coherence in the band of 5 Hz to 45 Hz in 309 ECGs and compared the coherence measure with an automatic out-of-band noise evaluation, quantified at a scale from 0 (clean) to 10 (very noisy). The generalized magnitude squared coherence (GMSC), which is a global measure of the linear relationships among the leads, was used. A high coherence (GMSC> 0. 95) was always associated with very low noise (level 0 or 1) and 0.9<GMSC<0.95 was associated with levels 0-2. For noise levels > 2 the GMSC was <0.87 in all cases. There were no cases of high noise level and a high coherence, however, in 32% of the cases with noise level 0 or 1 the GMSC was <0.8. For low-noise ECGs the GMSC is close to unity, with a good correlation between noise level and GMSC for normal ECGs. However, a low coherence also seems to be associated with abnormalities in the ECG, which will be subject for further study.

AB - The 12-lead ECG can be described as the projection of a time-varying dipole on the lead vectors. This dipole-source assumption implies that the different leads must show a high coherence and that deviations from values close to unity may indicate the presence of noise. We evaluated the average coherence in the band of 5 Hz to 45 Hz in 309 ECGs and compared the coherence measure with an automatic out-of-band noise evaluation, quantified at a scale from 0 (clean) to 10 (very noisy). The generalized magnitude squared coherence (GMSC), which is a global measure of the linear relationships among the leads, was used. A high coherence (GMSC> 0. 95) was always associated with very low noise (level 0 or 1) and 0.9<GMSC<0.95 was associated with levels 0-2. For noise levels > 2 the GMSC was <0.87 in all cases. There were no cases of high noise level and a high coherence, however, in 32% of the cases with noise level 0 or 1 the GMSC was <0.8. For low-noise ECGs the GMSC is close to unity, with a good correlation between noise level and GMSC for normal ECGs. However, a low coherence also seems to be associated with abnormalities in the ECG, which will be subject for further study.

UR - http://www.scopus.com/inward/record.url?scp=84931299783&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:84931299783

VL - 41

SP - 37

EP - 40

JO - Computing in Cardiology

JF - Computing in Cardiology

SN - 0276-6574

T2 - 41st Computing in Cardiology Conference, CinC 2014

Y2 - 7 September 2014 through 10 September 2014

ER -

ID: 204298447