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dc.contributor.authorCuponne, Anna
dc.contributor.authorVallverdú Ferrer, Montserrat
dc.contributor.authorGomis Román, Pedro
dc.contributor.authorPorta, Alberto
dc.contributor.authorVoss, Andreas
dc.contributor.authorBayes de Luna, Antonio
dc.contributor.authorCaminal Magrans, Pere
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria de Sistemes, Automàtica i Informàtica Industrial
dc.identifier.citationCuponne, A. [et al.]. Symbolic dynamics of QT interval series in ischemic cardiomyopathy. A: Computing in Cardiology. "Computing in Cardiology 2012 Volume 39". Krakow: Computing in Cardiology, 2012, p. 617-620.
dc.description.abstractRepolarization dynamics may be of increasing interest in analyzing ECG-Holter for characterization of myocardial ischemic events related to cardiac death. The quantification of the dynamics of the beat-to-beat QT interval fluctuations, representing changes in repolarization duration, may be another emerging marker of cardiac events. Based on these arguments, we propose a symbolic analysis series to quantify the dynamics of the beat-to-beat QT interval fluctuations, representing changes in repolarization duration, and the prevalence of sympathetic or parasympathetic cardiac modulation in the RR series. This analysis decomposes the series in patterns of length L=3 beat and classify them into three categories: non-variable, variable, and very variable patterns referred to as P0, P1 and P2 patterns. The present work analyses QT and RR series obtained from 24-hour ECG-Holter recordings in order to obtained patterns able to stratify high (HRG) and low risk (LRG) of suffer cardiac mortality in patients with symptomatic myocardial ischemia. Comparing LRG and HRG, results showed that pattern P0 could better quantify QT series and pattern P2 the RR series. These findings suggest a decreased cardiac vagal function with a relative increase in sympathetic cardiac modulation, and more complex pattern of ventricular repolarization in the HRG.
dc.format.extent4 p.
dc.publisherComputing in Cardiology
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Matemàtiques i estadística::Investigació operativa
dc.titleSymbolic dynamics of QT interval series in ischemic cardiomyopathy
dc.typeConference lecture
dc.contributor.groupUniversitat Politècnica de Catalunya. SISBIO - Senyals i Sistemes Biomèdics
dc.description.peerreviewedPeer Reviewed
dc.subject.amsClassificació AMS::92 Biology and other natural sciences
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
local.citation.authorCuponne, A.; Vallverdu, M.; Gomis, P.; Porta, A.; Voss, A.; de Luna, A. B.; Caminal, P.
local.citation.contributorComputing in Cardiology
local.citation.publicationNameComputing in Cardiology 2012 Volume 39

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