92 lines
5.8 KiB
XML
92 lines
5.8 KiB
XML
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<dri:objIdentifier>od______2367::0001a50c6388e9bfcb791a924ec4b837</dri:objIdentifier>
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<dri:recordIdentifier>oai:pumaoai.isti.cnr.it:cnr.imati/cnr.ian.pv/1999-PP-018</dri:recordIdentifier>
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<dri:dateOfCollection/>
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<dri:mdFormat/>
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<dri:repositoryId>
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10d18b66-1d2a-4579-9adc-aa57b0821c7f_UmVwb3NpdG9yeVNlcnZpY2VSZXNvdXJjZXMvUmVwb3NpdG9yeVNlcnZpY2VSZXNvdXJjZVR5cGU=
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<dr:dateOfCollection>2016-11-22T09:15:30.817Z</dr:dateOfCollection>
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<dr:dateOfTransformation>2016-11-22T09:18:15.904Z</dr:dateOfTransformation>
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</header>
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<metadata xmlns="http://namespace.openaire.eu/">
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<dc:title>Anisotropic mechanisms for multiphasic unipolar electrograms. Simulation studies and experimental
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recordings
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</dc:title>
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<dc:creator>Colli Franzone, Piero,</dc:creator>
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<dc:creator>Guerri, Luciano,</dc:creator>
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<dc:creator>Pennacchio, Micol,</dc:creator>
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<dc:creator>Taccardi, Bruno</dc:creator>
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<dc:date>1999-09-30</dc:date>
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<dc:description>The origin of the multiple, complex morphologies observed in
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unipolar epicardial electrograms, and their relationships with myocardial
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architecture, have not been fully elucidated. To clarify this problem we
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simulated electrograms (EGs) with a model representing the heart as an
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anisotropic bidomain with unequal anisotropy ratio, ellipsoidal ventricular
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geometry, transmural fiber rotation, epi-endocardial obliqueness of fiber
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direction and a simplified conduction system. The electrograms were compared
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with those directly recorded from the surface of isolated dog hearts immersed
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in a conducting medium. The model accurately reproduced the recorded EG
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morphologies for excitation wave fronts that reach the recording sites by
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spreading either along or across fibers.The
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origin of the multiple waves that constitute the QRS complex could be better
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understood after splitting the current sources, the potential distributions and
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the EGs into a field component (further subdivided into an axial and a conormal component) and a "reference"
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component. The split model provides an explanation of the interaction between the three-dimensional geometry
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and direction of
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propagation of a spreading wave front, the architecture of the fibers through
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which excitation is spreading, the potential distributions and the QRS wave
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forms. Because epicardial potentials, electrograms and isochrone contours can be
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computed noninvasively from body surface measurements, interpreting epicardial
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EGs in terms of intramural events may have clinical relevance.
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</dc:description>
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<dc:identifier>http://puma.isti.cnr.it/dfdownloadnew.php?ident=cnr.imati/cnr.ian.pv/1999-PP-018</dc:identifier>
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<dc:identifier>
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http://puma.isti.cnr.it/rmydownload.php?filename=cnr.imati/cnr.ian.pv/1999-PP-018/1999-PP-018_0.ps
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</dc:identifier>
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<dc:language>eng</dc:language>
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<dc:source>Preprint ercim.cnr.ian//1999-1151, 1999.</dc:source>
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<dc:subject>Electrograms, bidomain model, reference potential, cardiac potential maps, anisotropic propagation,
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source splitting
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</dc:subject>
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<dc:subject>info:eu-repo/classification/msc/78A70,65N30</dc:subject>
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<dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
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<dc:type>info:eu-repo/semantics/preprint</dc:type>
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<dr:CobjCategory>0016</dr:CobjCategory>
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<dr:CobjIdentifier/>
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<oaf:dateAccepted>1999-09-30</oaf:dateAccepted>
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<oaf:collectedDatasourceid>opendoar____::2367</oaf:collectedDatasourceid>
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<oaf:accessrights>OPEN</oaf:accessrights>
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<oaf:collectedFrom id="opendoar____::2367" name="PUblication MAnagement"/>
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</metadata>
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xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/provenance http://www.openarchives.org/OAI/2.0/provenance.xsd">
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<originDescription altered="true" harvestDate="2016-11-22T09:15:30.817Z">
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<baseURL>http://pumaoai.isti.cnr.it/openoai2.php</baseURL>
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<identifier>oai:pumaoai.isti.cnr.it:cnr.imati/cnr.ian.pv/1999-PP-018</identifier>
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<datestamp>1999-10-08</datestamp>
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<metadataNamespace>http://www.openarchives.org/OAI/2.0/oai_dc/</metadataNamespace>
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</originDescription>
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</record> |