Measuring changing spatial complexity in ventricular fibrillation using the Karhunen-Loeve decomposition of 506-channel epicardial data

P. V. Bayly, Eric Johnson, P. D. Wolf, W. M. Smith, R. E. Ideker

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

The Karhunen-Loeve (K-L) decomposition was used to describe quantitatively changes in spatial organization during extended episodes of ventricular fibrillation (VF). VF was induced by premature stimulation in 5 pigs. Unipolar epicardial electrograms were simultaneously recorded with a 22 × 23 array of electrodes spaced 1.12 mm apart. Data consisting of epicardial potentials during VF, as well as during sinus rhythm, were decomposed into orthogonal spatial modes using the K-L method. In sinus rhythm, 3-4 K-L modes were required to account for 90% of the total variance, compared to 5-28 during VF. As VF progressed from 1 to 3 seconds the number of modes, M, required to reach the 90% threshold increased in every animal. From 3 seconds to 60 seconds M always decreased. These differences were significant with p < 0.05, suggesting that electrically induced VF in pigs increases in organization during the first minute after initiation.

Original languageEnglish (US)
Title of host publicationComputers in Cardiology
PublisherPubl by IEEE
Pages53-56
Number of pages4
ISBN (Print)0818654708
StatePublished - Dec 1 1993
Externally publishedYes
EventProceedings of the 1993 Conference on Computers in Cardiology - London, UK
Duration: Sep 5 1993Sep 8 1993

Other

OtherProceedings of the 1993 Conference on Computers in Cardiology
CityLondon, UK
Period9/5/939/8/93

Fingerprint

Ventricular Fibrillation
Decomposition
Animals
Electrodes
Swine

All Science Journal Classification (ASJC) codes

  • Software
  • Cardiology and Cardiovascular Medicine

Cite this

Bayly, P. V., Johnson, E., Wolf, P. D., Smith, W. M., & Ideker, R. E. (1993). Measuring changing spatial complexity in ventricular fibrillation using the Karhunen-Loeve decomposition of 506-channel epicardial data. In Computers in Cardiology (pp. 53-56). Publ by IEEE.

Measuring changing spatial complexity in ventricular fibrillation using the Karhunen-Loeve decomposition of 506-channel epicardial data. / Bayly, P. V.; Johnson, Eric; Wolf, P. D.; Smith, W. M.; Ideker, R. E.

Computers in Cardiology. Publ by IEEE, 1993. p. 53-56.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Bayly, PV, Johnson, E, Wolf, PD, Smith, WM & Ideker, RE 1993, Measuring changing spatial complexity in ventricular fibrillation using the Karhunen-Loeve decomposition of 506-channel epicardial data. in Computers in Cardiology. Publ by IEEE, pp. 53-56, Proceedings of the 1993 Conference on Computers in Cardiology, London, UK, 9/5/93.
Bayly PV, Johnson E, Wolf PD, Smith WM, Ideker RE. Measuring changing spatial complexity in ventricular fibrillation using the Karhunen-Loeve decomposition of 506-channel epicardial data. In Computers in Cardiology. Publ by IEEE. 1993. p. 53-56
Bayly, P. V. ; Johnson, Eric ; Wolf, P. D. ; Smith, W. M. ; Ideker, R. E. / Measuring changing spatial complexity in ventricular fibrillation using the Karhunen-Loeve decomposition of 506-channel epicardial data. Computers in Cardiology. Publ by IEEE, 1993. pp. 53-56
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