Simultaneously collected monopolar and discrete bipolar electrograms: comparison of activation time detection algorithms.
Designation of the time of local activation is fundamental to electrophysiological mapping. In normal myocardium, the minimum slope in extracellular monopolar (MP) electrograms has been linked through simultaneous intracellular and extracellular recordings to phase o of the action potential. However...
| Publicado en: | Pacing & Clinical Electrophysiology Vol. 16; no. 3; pp. 426 - 434 |
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| Autores principales: | , , |
| Formato: | Journal Article |
| Publicado: |
Wiley-Blackwell
Mar1993
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106038410&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106038410 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01478389 4F8 jtl: Pacing & Clinical Electrophysiology issn: 01478389 maglogo: Y pubinfo: dt: Mar1993 vid: 16 iid: 3 pid: 480 pub: Wiley-Blackwell place: Malden, Massachusetts artinfo: ui: 106038410 2009414466 NLM7681194 106038410 ppf: 426 ppct: 8 formats: fmt: @attributes: type: P tig: atl: Simultaneously collected monopolar and discrete bipolar electrograms: comparison of activation time detection algorithms. aug: au: Pieper CF Blue R Pacifico A sug: ab: Designation of the time of local activation is fundamental to electrophysiological mapping. In normal myocardium, the minimum slope in extracellular monopolar (MP) electrograms has been linked through simultaneous intracellular and extracellular recordings to phase o of the action potential. However, no similar correlation has been demonstrated for a parameter from bipolar (BP) electrograms, now commonly used during electrophysiological studies and intraoperative mapping. The purpose of this work is to compare the activation time, determined according to several common algorithms applied to BP electrograms, with the time of the minimum slope in MP electrograms Simultaneous normal epicardial MP and BP electrograms were acquired from subjects undergoing surgery for Wolf-Parkinson-White Syndrome and from dogs. The activation time in BP electrograms was defined by four algorithms: (1) peak (P); (2) greatest absolute slope (S); (3) zero crossing of the segment containing the greatest slope (FZC); and (4) morphological (M). Each was compared to the time of the minimum slope in the simultaneously recorded MP response. The incidence of outliers was tabulated. The distribution o activation times computed using each BP algorithm was statistically different from the distribution of activation times derived from MP electrograms. M performed best (absolute difference: 2.6 ± 2.9 msec; cor coef: 0.9925 in man). The M, P, FZC, and S algorithms produced 3.2%. 3.5%, 4.7% and 4.7% outliers respectively. The overall performance of a morphologically based algorithm is superior to simplistic BP algorithms based only on slope or peak. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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