Characteristics of accessory pathways exhibiting decremental conduction
Identifieur interne : 000261 ( Istex/Corpus ); précédent : 000260; suivant : 000262Characteristics of accessory pathways exhibiting decremental conduction
Auteurs : Challon J. Murdock ; James W. Leitch ; Wee Siong Teo ; Arjun D. Sharma ; Raymond Yee ; George J. KleinSource :
- The American Journal of Cardiology [ 0002-9149 ] ; 1991.
Abstract
The prevalence, electrophysiologic characteristics and functional significance of decremental conduction over an accessory pathway were examined in this retrospective study of 653 patients who had an accessory pathway demonstrated at electrophysiologic study. Decremental conduction was identified in 50 patients (7.6%). In 15 patients with anterograde decremental conduction, the accessory pathway was right parietal or septal in 14 patients and left parietal in 1 patient. In the 40 patients with retrograde decrement, the accessory pathway was left parietal in 19, posteroseptal in 13, right parietal in 2 and right anteroseptal in 6 patients. Anterograde conduction over the accessory pathway was absent in 11 of the 40 patients with retrograde decrement. Retrograde conduction over the accessory pathway was absent in 9 patients with anterograde decrement. There was no significant difference in the accessory pathway effective refractory period, or shortest cycle length with 1:1 conduction over the accessory pathway in anterograde and retrograde directions. The shortest RR interval in atrial fibrillation between 2 preexcited QRS complexes was longer in patients wih anterograde decremental conduction than in a control group of patients with anterograde-conducting accessory pathways without decremental properties.These data demonstrate that decremental conduction over accessory pathways is uncommon. Anterograde decremental conduction usually occurs in right-sided or septal pathways that often do not conduct in the retrograde direction.
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DOI: 10.1016/0002-9149(91)90012-A
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Leitch</name><affiliation><mods:affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</mods:affiliation></affiliation></author><author><name sortKey="Teo, Wee Siong" sort="Teo, Wee Siong" uniqKey="Teo W" first="Wee Siong" last="Teo">Wee Siong Teo</name><affiliation><mods:affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</mods:affiliation></affiliation></author><author><name sortKey="Sharma, Arjun D" sort="Sharma, Arjun D" uniqKey="Sharma A" first="Arjun D." last="Sharma">Arjun D. Sharma</name><affiliation><mods:affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</mods:affiliation></affiliation></author><author><name sortKey="Yee, Raymond" sort="Yee, Raymond" uniqKey="Yee R" first="Raymond" last="Yee">Raymond Yee</name><affiliation><mods:affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</mods:affiliation></affiliation></author><author><name sortKey="Klein, George J" sort="Klein, George J" uniqKey="Klein G" first="George J." last="Klein">George J. Klein</name><affiliation><mods:affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:7D01CAF6388EDE69C21023072A6CE63B2C419113</idno><date when="1991" year="1991">1991</date><idno type="doi">10.1016/0002-9149(91)90012-A</idno><idno type="url">https://api-v5.istex.fr/document/7D01CAF6388EDE69C21023072A6CE63B2C419113/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000261</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000261</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Characteristics of accessory pathways exhibiting decremental conduction</title><author><name sortKey="Murdock, Challon J" sort="Murdock, Challon J" uniqKey="Murdock C" first="Challon J." last="Murdock">Challon J. Murdock</name><affiliation><mods:affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</mods:affiliation></affiliation></author><author><name sortKey="Leitch, James W" sort="Leitch, James W" uniqKey="Leitch J" first="James W." last="Leitch">James W. Leitch</name><affiliation><mods:affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</mods:affiliation></affiliation></author><author><name sortKey="Teo, Wee Siong" sort="Teo, Wee Siong" uniqKey="Teo W" first="Wee Siong" last="Teo">Wee Siong Teo</name><affiliation><mods:affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</mods:affiliation></affiliation></author><author><name sortKey="Sharma, Arjun D" sort="Sharma, Arjun D" uniqKey="Sharma A" first="Arjun D." last="Sharma">Arjun D. Sharma</name><affiliation><mods:affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</mods:affiliation></affiliation></author><author><name sortKey="Yee, Raymond" sort="Yee, Raymond" uniqKey="Yee R" first="Raymond" last="Yee">Raymond Yee</name><affiliation><mods:affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</mods:affiliation></affiliation></author><author><name sortKey="Klein, George J" sort="Klein, George J" uniqKey="Klein G" first="George J." last="Klein">George J. Klein</name><affiliation><mods:affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">The American Journal of Cardiology</title><title level="j" type="abbrev">AJC</title><idno type="ISSN">0002-9149</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1991">1991</date><biblScope unit="volume">67</biblScope><biblScope unit="issue">6</biblScope><biblScope unit="page" from="506">506</biblScope><biblScope unit="page" to="510">510</biblScope></imprint><idno type="ISSN">0002-9149</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0002-9149</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The prevalence, electrophysiologic characteristics and functional significance of decremental conduction over an accessory pathway were examined in this retrospective study of 653 patients who had an accessory pathway demonstrated at electrophysiologic study. Decremental conduction was identified in 50 patients (7.6%). In 15 patients with anterograde decremental conduction, the accessory pathway was right parietal or septal in 14 patients and left parietal in 1 patient. In the 40 patients with retrograde decrement, the accessory pathway was left parietal in 19, posteroseptal in 13, right parietal in 2 and right anteroseptal in 6 patients. Anterograde conduction over the accessory pathway was absent in 11 of the 40 patients with retrograde decrement. Retrograde conduction over the accessory pathway was absent in 9 patients with anterograde decrement. There was no significant difference in the accessory pathway effective refractory period, or shortest cycle length with 1:1 conduction over the accessory pathway in anterograde and retrograde directions. The shortest RR interval in atrial fibrillation between 2 preexcited QRS complexes was longer in patients wih anterograde decremental conduction than in a control group of patients with anterograde-conducting accessory pathways without decremental properties.These data demonstrate that decremental conduction over accessory pathways is uncommon. Anterograde decremental conduction usually occurs in right-sided or septal pathways that often do not conduct in the retrograde direction.</div></front></TEI><istex><corpusName>elsevier</corpusName><author><json:item><name>Challon J. Murdock MB, BS</name><affiliations><json:string>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</json:string></affiliations></json:item><json:item><name>James W. Leitch MB, BS</name><affiliations><json:string>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</json:string></affiliations></json:item><json:item><name>Wee Siong Teo MB, BS</name><affiliations><json:string>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</json:string></affiliations></json:item><json:item><name>Arjun D. Sharma MD</name><affiliations><json:string>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</json:string></affiliations></json:item><json:item><name>Raymond Yee MD</name><affiliations><json:string>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</json:string></affiliations></json:item><json:item><name>George J. Klein MD</name><affiliations><json:string>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Arrhythmias and conduction disturbances</value></json:item></subject><articleId><json:string>9190012A</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>The prevalence, electrophysiologic characteristics and functional significance of decremental conduction over an accessory pathway were examined in this retrospective study of 653 patients who had an accessory pathway demonstrated at electrophysiologic study. Decremental conduction was identified in 50 patients (7.6%). In 15 patients with anterograde decremental conduction, the accessory pathway was right parietal or septal in 14 patients and left parietal in 1 patient. In the 40 patients with retrograde decrement, the accessory pathway was left parietal in 19, posteroseptal in 13, right parietal in 2 and right anteroseptal in 6 patients. Anterograde conduction over the accessory pathway was absent in 11 of the 40 patients with retrograde decrement. Retrograde conduction over the accessory pathway was absent in 9 patients with anterograde decrement. There was no significant difference in the accessory pathway effective refractory period, or shortest cycle length with 1:1 conduction over the accessory pathway in anterograde and retrograde directions. The shortest RR interval in atrial fibrillation between 2 preexcited QRS complexes was longer in patients wih anterograde decremental conduction than in a control group of patients with anterograde-conducting accessory pathways without decremental properties.These data demonstrate that decremental conduction over accessory pathways is uncommon. Anterograde decremental conduction usually occurs in right-sided or septal pathways that often do not conduct in the retrograde direction.</abstract><qualityIndicators><score>5.093</score><pdfWordCount>2525</pdfWordCount><pdfCharCount>18857</pdfCharCount><pdfVersion>1.3</pdfVersion><pdfPageCount>5</pdfPageCount><pdfPageSize>576 x 828 pts</pdfPageSize><refBibsNative>true</refBibsNative><abstractWordCount>214</abstractWordCount><abstractCharCount>1551</abstractCharCount><keywordCount>1</keywordCount></qualityIndicators><title>Characteristics of accessory pathways exhibiting decremental conduction</title><pii><json:string>0002-9149(91)90012-A</json:string></pii><genre><json:string>research-article</json:string></genre><host><title>The American Journal of Cardiology</title><language><json:string>unknown</json:string></language><publicationDate>1991</publicationDate><issn><json:string>0002-9149</json:string></issn><pii><json:string>S0002-9149(00)X0643-1</json:string></pii><volume>67</volume><issue>6</issue><pages><first>506</first><last>510</last></pages><genre><json:string>journal</json:string></genre></host><categories><wos><json:string>science</json:string><json:string>cardiac & cardiovascular systems</json:string></wos><scienceMetrix><json:string>health sciences</json:string><json:string>clinical medicine</json:string><json:string>cardiovascular system & hematology</json:string></scienceMetrix><inist><json:string>sciences appliquees, technologies et medecines</json:string><json:string>sciences biologiques et medicales</json:string><json:string>sciences medicales</json:string><json:string>radiotherapie. traitement instrumental. physiotherapie. reeducation. readaptation, orthophonie, crenotherapie. traitement dietetique et traitements divers (generalites)</json:string></inist></categories><publicationDate>1991</publicationDate><copyrightDate>1991</copyrightDate><doi><json:string>10.1016/0002-9149(91)90012-A</json:string></doi><id>7D01CAF6388EDE69C21023072A6CE63B2C419113</id><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api-v5.istex.fr/document/7D01CAF6388EDE69C21023072A6CE63B2C419113/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api-v5.istex.fr/document/7D01CAF6388EDE69C21023072A6CE63B2C419113/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api-v5.istex.fr/document/7D01CAF6388EDE69C21023072A6CE63B2C419113/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Characteristics of accessory pathways exhibiting decremental conduction</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>ELSEVIER</publisher><availability><p>ELSEVIER</p></availability><date>1991</date></publicationStmt><notesStmt><note>This study was supported in part by the Heart and Stroke Foundation of Ontario, Toronto, Canada.</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Characteristics of accessory pathways exhibiting decremental conduction</title><author xml:id="author-0000"><persName><forename type="first">Challon J.</forename><surname>Murdock</surname></persName><roleName type="degree">MB, BS</roleName><affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</affiliation></author><author xml:id="author-0001"><persName><forename type="first">James W.</forename><surname>Leitch</surname></persName><roleName type="degree">MB, BS</roleName><affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</affiliation></author><author xml:id="author-0002"><persName><forename type="first">Wee Siong</forename><surname>Teo</surname></persName><roleName type="degree">MB, BS</roleName><affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</affiliation></author><author xml:id="author-0003"><persName><forename type="first">Arjun D.</forename><surname>Sharma</surname></persName><roleName type="degree">MD</roleName><affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</affiliation></author><author xml:id="author-0004"><persName><forename type="first">Raymond</forename><surname>Yee</surname></persName><roleName type="degree">MD</roleName><affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</affiliation></author><author xml:id="author-0005"><persName><forename type="first">George J.</forename><surname>Klein</surname></persName><roleName type="degree">MD</roleName><note type="biography">Address for reprints: George J. Klein, MD, Arrhythmia Service, Cardiac Investigation Unit, University Hospital, P.O. Box 5339 Postal Station A, London, Ontario, Canada.</note><note type="biography">Dr. Klein is a Distinguished Research Professor of the Heart and Stroke Foundation of Ontario.</note><affiliation>Address for reprints: George J. Klein, MD, Arrhythmia Service, Cardiac Investigation Unit, University Hospital, P.O. Box 5339 Postal Station A, London, Ontario, Canada.</affiliation><affiliation>Dr. Klein is a Distinguished Research Professor of the Heart and Stroke Foundation of Ontario.</affiliation><affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</affiliation></author><idno type="istex">7D01CAF6388EDE69C21023072A6CE63B2C419113</idno><idno type="DOI">10.1016/0002-9149(91)90012-A</idno><idno type="PII">0002-9149(91)90012-A</idno><idno type="ArticleID">9190012A</idno></analytic><monogr><title level="j">The American Journal of Cardiology</title><title level="j" type="abbrev">AJC</title><idno type="pISSN">0002-9149</idno><idno type="PII">S0002-9149(00)X0643-1</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1991"></date><biblScope unit="volume">67</biblScope><biblScope unit="issue">6</biblScope><biblScope unit="page" from="506">506</biblScope><biblScope unit="page" to="510">510</biblScope></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>1991</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>The prevalence, electrophysiologic characteristics and functional significance of decremental conduction over an accessory pathway were examined in this retrospective study of 653 patients who had an accessory pathway demonstrated at electrophysiologic study. Decremental conduction was identified in 50 patients (7.6%). In 15 patients with anterograde decremental conduction, the accessory pathway was right parietal or septal in 14 patients and left parietal in 1 patient. In the 40 patients with retrograde decrement, the accessory pathway was left parietal in 19, posteroseptal in 13, right parietal in 2 and right anteroseptal in 6 patients. Anterograde conduction over the accessory pathway was absent in 11 of the 40 patients with retrograde decrement. Retrograde conduction over the accessory pathway was absent in 9 patients with anterograde decrement. There was no significant difference in the accessory pathway effective refractory period, or shortest cycle length with 1:1 conduction over the accessory pathway in anterograde and retrograde directions. The shortest RR interval in atrial fibrillation between 2 preexcited QRS complexes was longer in patients wih anterograde decremental conduction than in a control group of patients with anterograde-conducting accessory pathways without decremental properties.These data demonstrate that decremental conduction over accessory pathways is uncommon. Anterograde decremental conduction usually occurs in right-sided or septal pathways that often do not conduct in the retrograde direction.</p></abstract><textClass><keywords scheme="keyword"><list><head>article-category</head><item><term>Arrhythmias and conduction disturbances</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="1990-10-29">Modified</change><change when="1991">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api-v5.istex.fr/document/7D01CAF6388EDE69C21023072A6CE63B2C419113/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: tail"><istex:xmlDeclaration>version="1.0" encoding="UTF-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla" xml:lang="en"><item-info><jid>AJC</jid><aid>9190012A</aid><ce:pii>0002-9149(91)90012-A</ce:pii><ce:doi>10.1016/0002-9149(91)90012-A</ce:doi><ce:copyright type="unknown" year="1991"></ce:copyright><ce:doctopics><ce:doctopic><ce:text>Arrhythmias and conduction disturbances</ce:text></ce:doctopic></ce:doctopics></item-info><head><ce:article-footnote><ce:label>☆</ce:label><ce:note-para>This study was supported in part by the Heart and Stroke Foundation of Ontario, Toronto, Canada.</ce:note-para></ce:article-footnote><ce:title>Characteristics of accessory pathways exhibiting decremental conduction</ce:title><ce:author-group><ce:author><ce:given-name>Challon J.</ce:given-name><ce:surname>Murdock</ce:surname><ce:degrees>MB, BS</ce:degrees></ce:author><ce:author><ce:given-name>James W.</ce:given-name><ce:surname>Leitch</ce:surname><ce:degrees>MB, BS</ce:degrees></ce:author><ce:author><ce:given-name>Wee Siong</ce:given-name><ce:surname>Teo</ce:surname><ce:degrees>MB, BS</ce:degrees></ce:author><ce:author><ce:given-name>Arjun D.</ce:given-name><ce:surname>Sharma</ce:surname><ce:degrees>MD</ce:degrees></ce:author><ce:author><ce:given-name>Raymond</ce:given-name><ce:surname>Yee</ce:surname><ce:degrees>MD</ce:degrees></ce:author><ce:author><ce:given-name>George J.</ce:given-name><ce:surname>Klein</ce:surname><ce:degrees>MD</ce:degrees><ce:cross-ref refid="COR1"><ce:sup loc="post">∗</ce:sup></ce:cross-ref><ce:cross-ref refid="FN1"><ce:sup loc="post">1</ce:sup></ce:cross-ref></ce:author><ce:affiliation><ce:textfn>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</ce:textfn></ce:affiliation><ce:correspondence id="COR1"><ce:label>∗</ce:label><ce:text>Address for reprints: George J. Klein, MD, Arrhythmia Service, Cardiac Investigation Unit, University Hospital, P.O. Box 5339 Postal Station A, London, Ontario, Canada.</ce:text></ce:correspondence><ce:footnote id="FN1"><ce:label>1</ce:label><ce:note-para>Dr. Klein is a Distinguished Research Professor of the Heart and Stroke Foundation of Ontario.</ce:note-para></ce:footnote></ce:author-group><ce:date-received day="5" month="6" year="1990"></ce:date-received><ce:date-revised day="29" month="10" year="1990"></ce:date-revised><ce:date-accepted day="31" month="10" year="1990"></ce:date-accepted><ce:abstract class="author"><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para view="all" id="simple-para.0010">The prevalence, electrophysiologic characteristics and functional significance of decremental conduction over an accessory pathway were examined in this retrospective study of 653 patients who had an accessory pathway demonstrated at electrophysiologic study. Decremental conduction was identified in 50 patients (7.6%). In 15 patients with anterograde decremental conduction, the accessory pathway was right parietal or septal in 14 patients and left parietal in 1 patient. In the 40 patients with retrograde decrement, the accessory pathway was left parietal in 19, posteroseptal in 13, right parietal in 2 and right anteroseptal in 6 patients. Anterograde conduction over the accessory pathway was absent in 11 of the 40 patients with retrograde decrement. Retrograde conduction over the accessory pathway was absent in 9 patients with anterograde decrement. There was no significant difference in the accessory pathway effective refractory period, or shortest cycle length with 1:1 conduction over the accessory pathway in anterograde and retrograde directions. The shortest RR interval in atrial fibrillation between 2 preexcited QRS complexes was longer in patients wih anterograde decremental conduction than in a control group of patients with anterograde-conducting accessory pathways without decremental properties.</ce:simple-para><ce:simple-para view="all" id="simple-para.0015">These data demonstrate that decremental conduction over accessory pathways is uncommon. Anterograde decremental conduction usually occurs in right-sided or septal pathways that often do not conduct in the retrograde direction.</ce:simple-para></ce:abstract-sec></ce:abstract></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Characteristics of accessory pathways exhibiting decremental conduction</title></titleInfo><titleInfo type="alternative" lang="en" contentType="CDATA"><title>Characteristics of accessory pathways exhibiting decremental conduction</title></titleInfo><name type="personal"><namePart type="given">Challon J.</namePart><namePart type="family">Murdock</namePart><namePart type="termsOfAddress">MB, BS</namePart><affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">James W.</namePart><namePart type="family">Leitch</namePart><namePart type="termsOfAddress">MB, BS</namePart><affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Wee Siong</namePart><namePart type="family">Teo</namePart><namePart type="termsOfAddress">MB, BS</namePart><affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Arjun D.</namePart><namePart type="family">Sharma</namePart><namePart type="termsOfAddress">MD</namePart><affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Raymond</namePart><namePart type="family">Yee</namePart><namePart type="termsOfAddress">MD</namePart><affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">George J.</namePart><namePart type="family">Klein</namePart><namePart type="termsOfAddress">MD</namePart><affiliation>From the Cardiac Investigation Unit, University Hospital, University of Western Ontario, London, Canada</affiliation><description>Address for reprints: George J. Klein, MD, Arrhythmia Service, Cardiac Investigation Unit, University Hospital, P.O. Box 5339 Postal Station A, London, Ontario, Canada.</description><description>Dr. Klein is a Distinguished Research Professor of the Heart and Stroke Foundation of Ontario.</description><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article"></genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">1991</dateIssued><dateModified encoding="w3cdtf">1990-10-29</dateModified><copyrightDate encoding="w3cdtf">1991</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">The prevalence, electrophysiologic characteristics and functional significance of decremental conduction over an accessory pathway were examined in this retrospective study of 653 patients who had an accessory pathway demonstrated at electrophysiologic study. Decremental conduction was identified in 50 patients (7.6%). In 15 patients with anterograde decremental conduction, the accessory pathway was right parietal or septal in 14 patients and left parietal in 1 patient. In the 40 patients with retrograde decrement, the accessory pathway was left parietal in 19, posteroseptal in 13, right parietal in 2 and right anteroseptal in 6 patients. Anterograde conduction over the accessory pathway was absent in 11 of the 40 patients with retrograde decrement. Retrograde conduction over the accessory pathway was absent in 9 patients with anterograde decrement. There was no significant difference in the accessory pathway effective refractory period, or shortest cycle length with 1:1 conduction over the accessory pathway in anterograde and retrograde directions. The shortest RR interval in atrial fibrillation between 2 preexcited QRS complexes was longer in patients wih anterograde decremental conduction than in a control group of patients with anterograde-conducting accessory pathways without decremental properties.These data demonstrate that decremental conduction over accessory pathways is uncommon. Anterograde decremental conduction usually occurs in right-sided or septal pathways that often do not conduct in the retrograde direction.</abstract><note>This study was supported in part by the Heart and Stroke Foundation of Ontario, Toronto, Canada.</note><subject><genre>article-category</genre><topic>Arrhythmias and conduction disturbances</topic></subject><relatedItem type="host"><titleInfo><title>The American Journal of Cardiology</title></titleInfo><titleInfo type="abbreviated"><title>AJC</title></titleInfo><genre type="journal">journal</genre><originInfo><dateIssued encoding="w3cdtf">19910301</dateIssued></originInfo><identifier type="ISSN">0002-9149</identifier><identifier type="PII">S0002-9149(00)X0643-1</identifier><part><date>19910301</date><detail type="volume"><number>67</number><caption>vol.</caption></detail><detail type="issue"><number>6</number><caption>no.</caption></detail><extent unit="issue pages"><start>A3</start><end>A49</end></extent><extent unit="issue pages"><start>A56</start></extent><extent unit="issue pages"><start>A63</start></extent><extent unit="issue pages"><start>A67</start><end>A68</end></extent><extent unit="issue pages"><start>A77</start></extent><extent unit="issue pages"><start>447</start><end>554</end></extent><extent unit="pages"><start>506</start><end>510</end></extent></part></relatedItem><identifier type="istex">7D01CAF6388EDE69C21023072A6CE63B2C419113</identifier><identifier type="DOI">10.1016/0002-9149(91)90012-A</identifier><identifier type="PII">0002-9149(91)90012-A</identifier><identifier type="ArticleID">9190012A</identifier><recordInfo><recordContentSource>ELSEVIER</recordContentSource></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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