Spatial resolution of body surface potential maps and magnetic field maps : a simulation study applied to the identification of ventricular pre-excitation sites
Identifieur interne : 003A18 ( Main/Exploration ); précédent : 003A17; suivant : 003A19Spatial resolution of body surface potential maps and magnetic field maps : a simulation study applied to the identification of ventricular pre-excitation sites
Auteurs : R. Hren [États-Unis] ; G. Stroink [Canada] ; B. M. Horacek [Canada]Source :
- Medical & biological engineering & computing [ 0140-0118 ] ; 1998.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Homme, Simulation.
English descriptors
- KwdEn :
Abstract
The spatial resolution of body surface potential maps (BSPMs) and magnetic field maps (MFMs) is investigated by means of an anatomically accurate computer model of the human ventricular myocardium. BSPMs and MFMs are calculated for the simulated activation sequences initiated at 35 pre-excitation sites located along the atrioventricular (AV) ring of the epicardium. Changes in the BSPMs and MFMs corresponding to different pre-excitation sites are quantified in terms of the correlation coefficient r. The spatial resolution (selectivity) for a given pre-excitation site is defined as the half-distance between those neighbouring locations at which morphological features of maps, in terms of r, become distinct (r < 0.95). It is found that, at 28 ms after the onset of pre-excitation and with no noise added, this distance ±SD, for all sites along the AV ring for the 117-lead BSPMs, is 0.83±0.32cm, and for the 64-lead and 128-lead MFMs it is 1.54±0.84 cm and 1.15±0.43 cm, respectively. The findings suggest that, when features of non-invasively recorded electrocardiographic and magnetocardiographic map patterns are used for identifying accessory pathways in patients suffering from WPW syndrome, BSPMs are likely to provide more detailed information for guiding the ablative treatment than MFMs. For some sites MFMs provide more information. Both modalities may provide additional assistance to the cardiologist in locating the site of the accessory pathway.
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Stroink</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Physiology & Biophysics, Dalhousie University</s1><s2>Halifax, B3H 4H7</s2><s3>CAN</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Halifax, B3H 4H7</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Physics, Dalhousie University</s1><s2>Halifax, B3H 3J5</s2><s3>CAN</s3><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Halifax, B3H 3J5</wicri:noRegion></affiliation></author><author><name sortKey="Horacek, B M" sort="Horacek, B M" uniqKey="Horacek B" first="B. M." last="Horacek">B. M. Horacek</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Physiology & Biophysics, Dalhousie University</s1><s2>Halifax, B3H 4H7</s2><s3>CAN</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Halifax, B3H 4H7</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">98-0231881</idno><date when="1998">1998</date><idno type="stanalyst">PASCAL 98-0231881 INIST</idno><idno type="RBID">Pascal:98-0231881</idno><idno type="wicri:Area/PascalFrancis/Corpus">000E23</idno><idno type="wicri:Area/PascalFrancis/Curation">001100</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000C86</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000C86</idno><idno type="wicri:doubleKey">0140-0118:1998:Hren R:spatial:resolution:of</idno><idno type="wicri:Area/Main/Merge">004036</idno><idno type="wicri:Area/Main/Curation">003A18</idno><idno type="wicri:Area/Main/Exploration">003A18</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Spatial resolution of body surface potential maps and magnetic field maps : a simulation study applied to the identification of ventricular pre-excitation sites</title><author><name sortKey="Hren, R" sort="Hren, R" uniqKey="Hren R" first="R." last="Hren">R. Hren</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Nora Eccles Harrison Cardiovascular Research & Training Institute, University of Utah</s1><s2>Salt Lake City, UT 84112</s2><s3>USA</s3><sZ>1 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Salt Lake City, UT 84112</wicri:noRegion></affiliation></author><author><name sortKey="Stroink, G" sort="Stroink, G" uniqKey="Stroink G" first="G." last="Stroink">G. Stroink</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Physiology & Biophysics, Dalhousie University</s1><s2>Halifax, B3H 4H7</s2><s3>CAN</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Halifax, B3H 4H7</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Physics, Dalhousie University</s1><s2>Halifax, B3H 3J5</s2><s3>CAN</s3><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Halifax, B3H 3J5</wicri:noRegion></affiliation></author><author><name sortKey="Horacek, B M" sort="Horacek, B M" uniqKey="Horacek B" first="B. M." last="Horacek">B. M. Horacek</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Physiology & Biophysics, Dalhousie University</s1><s2>Halifax, B3H 4H7</s2><s3>CAN</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Halifax, B3H 4H7</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Medical & biological engineering & computing</title><title level="j" type="abbreviated">Med. biol. eng. comput.</title><idno type="ISSN">0140-0118</idno><imprint><date when="1998">1998</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Medical & biological engineering & computing</title><title level="j" type="abbreviated">Med. biol. eng. comput.</title><idno type="ISSN">0140-0118</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Body surface</term><term>Electrocardiography</term><term>Human</term><term>Magnetic field</term><term>Models</term><term>Myocardium</term><term>Preexcitation ventricular syndrome</term><term>Simulation</term><term>Spatial resolution</term><term>Surface potential</term><term>Wolff Parkinson White syndrome</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Champ magnétique</term><term>Résolution spatiale</term><term>Surface corporelle</term><term>Wolff Parkinson White syndrome</term><term>Electrocardiographie</term><term>Modèle</term><term>Homme</term><term>Myocarde</term><term>Potentiel surface</term><term>Simulation</term><term>Préexcitation ventriculaire syndrome</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Homme</term><term>Simulation</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The spatial resolution of body surface potential maps (BSPMs) and magnetic field maps (MFMs) is investigated by means of an anatomically accurate computer model of the human ventricular myocardium. BSPMs and MFMs are calculated for the simulated activation sequences initiated at 35 pre-excitation sites located along the atrioventricular (AV) ring of the epicardium. Changes in the BSPMs and MFMs corresponding to different pre-excitation sites are quantified in terms of the correlation coefficient r. The spatial resolution (selectivity) for a given pre-excitation site is defined as the half-distance between those neighbouring locations at which morphological features of maps, in terms of r, become distinct (r < 0.95). It is found that, at 28 ms after the onset of pre-excitation and with no noise added, this distance ±SD, for all sites along the AV ring for the 117-lead BSPMs, is 0.83±0.32cm, and for the 64-lead and 128-lead MFMs it is 1.54±0.84 cm and 1.15±0.43 cm, respectively. The findings suggest that, when features of non-invasively recorded electrocardiographic and magnetocardiographic map patterns are used for identifying accessory pathways in patients suffering from WPW syndrome, BSPMs are likely to provide more detailed information for guiding the ablative treatment than MFMs. For some sites MFMs provide more information. Both modalities may provide additional assistance to the cardiologist in locating the site of the accessory pathway.</div></front></TEI><affiliations><list><country><li>Canada</li><li>États-Unis</li></country></list><tree><country name="États-Unis"><noRegion><name sortKey="Hren, R" sort="Hren, R" uniqKey="Hren R" first="R." last="Hren">R. Hren</name></noRegion></country><country name="Canada"><noRegion><name sortKey="Stroink, G" sort="Stroink, G" uniqKey="Stroink G" first="G." last="Stroink">G. Stroink</name></noRegion><name sortKey="Horacek, B M" sort="Horacek, B M" uniqKey="Horacek B" first="B. M." last="Horacek">B. M. Horacek</name><name sortKey="Stroink, G" sort="Stroink, G" uniqKey="Stroink G" first="G." last="Stroink">G. Stroink</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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