Can transventricular intracardiac impedance measurement discriminate haemodynamically unstable ventricular arrhythmias in human?
Aims To measure changes in transventricular impedance during arrhythmias. Methods and results Patients were studied during electrophysiological studies. A quadrapolar catheter was positioned at the right ventricular apex (RVA) and a decapolar catheter within the coronary sinus (CS). Transventricular...
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| Veröffentlicht in: | Europace (London, England) England), 2007-02, Vol.9 (2), p.122-126 |
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| creator | Kaye, Gerry Edgar, Deborah Mudawi, Telal Lippert, Michael Czygan, Gerald |
| description | Aims To measure changes in transventricular impedance during arrhythmias.
Methods and results Patients were studied during electrophysiological studies. A quadrapolar catheter was positioned at the right ventricular apex (RVA) and a decapolar catheter within the coronary sinus (CS). Transventricular impedance was measured by injecting a subthreshold biphasic rectangular pulse of 600 µ A between poles 1 of the CS catheter and pole 1 of the RVA catheter and the voltage measured between CS pole 10 and RVA catheter pole 4. Stroke impedance (SZ), surface ECG, intracardiac electrogram (IEGM), and invasive femoral artery blood pressure (FAP) were recorded. Twenty-eight patients were analysed, 5 with inducible, haemodynamically unstable ventricular tachycardia (VT) (HUSVT), 5 with stable VT (HSVT). During HUSVT, the SZ value reduced to 22% (range 0.15-0.32 P < 0.001) in comparison with sinus rhythm. For HSVT, the SZ value reduced to 58% (range 0.33-0.88) P < 0.01, significantly different from HUSVT (P < 0.01). There was a good correlation between reduction of SZ and arterial pulse pressure (PP) during arrhythmias (r = 0.95).
Conclusion Changes in SZ strongly correlated with PP amplitude. Transventricular impedance fell significantly during unstable arrhythmias and may be useful as a sensor capable of haemodynamic discrimination. |
| doi_str_mv | 10.1093/europace/eul150 |
| format | Article |
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Methods and results Patients were studied during electrophysiological studies. A quadrapolar catheter was positioned at the right ventricular apex (RVA) and a decapolar catheter within the coronary sinus (CS). Transventricular impedance was measured by injecting a subthreshold biphasic rectangular pulse of 600 µ A between poles 1 of the CS catheter and pole 1 of the RVA catheter and the voltage measured between CS pole 10 and RVA catheter pole 4. Stroke impedance (SZ), surface ECG, intracardiac electrogram (IEGM), and invasive femoral artery blood pressure (FAP) were recorded. Twenty-eight patients were analysed, 5 with inducible, haemodynamically unstable ventricular tachycardia (VT) (HUSVT), 5 with stable VT (HSVT). During HUSVT, the SZ value reduced to 22% (range 0.15-0.32 P < 0.001) in comparison with sinus rhythm. For HSVT, the SZ value reduced to 58% (range 0.33-0.88) P < 0.01, significantly different from HUSVT (P < 0.01). There was a good correlation between reduction of SZ and arterial pulse pressure (PP) during arrhythmias (r = 0.95).
Conclusion Changes in SZ strongly correlated with PP amplitude. Transventricular impedance fell significantly during unstable arrhythmias and may be useful as a sensor capable of haemodynamic discrimination.</description><identifier>ISSN: 1099-5129</identifier><identifier>EISSN: 1532-2092</identifier><identifier>DOI: 10.1093/europace/eul150</identifier><identifier>PMID: 17272334</identifier><language>eng</language><publisher>England: Oxford University Press</publisher><subject>Cardiac Pacing, Artificial ; Cardiography, Impedance - methods ; Electrocardiography ; Female ; Humans ; Linear Models ; Male ; Middle Aged ; Predictive Value of Tests ; Sensitivity and Specificity ; Tachycardia, Ventricular - diagnosis ; Tachycardia, Ventricular - physiopathology</subject><ispartof>Europace (London, England), 2007-02, Vol.9 (2), p.122-126</ispartof><rights>The European Society of Cardiology 2007. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org 2007</rights><rights>Copyright Oxford University Press(England) Feb 2007</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c398t-ae4e6ab09a46b0ae20893d15dbfd5b17816c4d1d976248bcfa517284628b02d3</citedby><cites>FETCH-LOGICAL-c398t-ae4e6ab09a46b0ae20893d15dbfd5b17816c4d1d976248bcfa517284628b02d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,777,781,1599,27905,27906</link.rule.ids><linktorsrc>$$Uhttps://dx.doi.org/10.1093/europace/eul150$$EView_record_in_Oxford_University_Press$$FView_record_in_$$GOxford_University_Press</linktorsrc><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/17272334$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Kaye, Gerry</creatorcontrib><creatorcontrib>Edgar, Deborah</creatorcontrib><creatorcontrib>Mudawi, Telal</creatorcontrib><creatorcontrib>Lippert, Michael</creatorcontrib><creatorcontrib>Czygan, Gerald</creatorcontrib><title>Can transventricular intracardiac impedance measurement discriminate haemodynamically unstable ventricular arrhythmias in human?</title><title>Europace (London, England)</title><addtitle>Europace</addtitle><description>Aims To measure changes in transventricular impedance during arrhythmias.
Methods and results Patients were studied during electrophysiological studies. A quadrapolar catheter was positioned at the right ventricular apex (RVA) and a decapolar catheter within the coronary sinus (CS). Transventricular impedance was measured by injecting a subthreshold biphasic rectangular pulse of 600 µ A between poles 1 of the CS catheter and pole 1 of the RVA catheter and the voltage measured between CS pole 10 and RVA catheter pole 4. Stroke impedance (SZ), surface ECG, intracardiac electrogram (IEGM), and invasive femoral artery blood pressure (FAP) were recorded. Twenty-eight patients were analysed, 5 with inducible, haemodynamically unstable ventricular tachycardia (VT) (HUSVT), 5 with stable VT (HSVT). During HUSVT, the SZ value reduced to 22% (range 0.15-0.32 P < 0.001) in comparison with sinus rhythm. For HSVT, the SZ value reduced to 58% (range 0.33-0.88) P < 0.01, significantly different from HUSVT (P < 0.01). There was a good correlation between reduction of SZ and arterial pulse pressure (PP) during arrhythmias (r = 0.95).
Conclusion Changes in SZ strongly correlated with PP amplitude. Transventricular impedance fell significantly during unstable arrhythmias and may be useful as a sensor capable of haemodynamic discrimination.</description><subject>Cardiac Pacing, Artificial</subject><subject>Cardiography, Impedance - methods</subject><subject>Electrocardiography</subject><subject>Female</subject><subject>Humans</subject><subject>Linear Models</subject><subject>Male</subject><subject>Middle Aged</subject><subject>Predictive Value of Tests</subject><subject>Sensitivity and Specificity</subject><subject>Tachycardia, Ventricular - diagnosis</subject><subject>Tachycardia, Ventricular - physiopathology</subject><issn>1099-5129</issn><issn>1532-2092</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkTtrHDEUhUWIydrr1OmCSOHCMLakeUlVMItfsODG_XBHustqGWkm0siwnX-6ZXZDTBpX9xTfPfdxCPnB2RVnqrzGFMYJNGYx8Jp9Iae8LkUhmBJfs2ZKFTUXakHOYtwxxlqh6m9kwVvRirKsTsnrCjydA_j4gn4OVqcBArVZgoZgLGhq3YQGvEbqEGIK6DJJjY06WGc9zEi3gG40ew_OahiGPU0-ztAPSD-6Qgjb_bx1FmKeQLfJgf99Tk42MET8fqxL8nx3-7x6KNZP94-rm3WhSyXnArDCBnqmoGp6BiiYVKXhtek3pu55K3mjK8ONahtRyV5voM5HyqoRsmfClEtycbCdwvgnYZw7lw_AYQCPY4pdI1UjWcMy-Os_cDem4PNqHVdSKCVZlaHrA6TDGGPATTflX0DYd5x178F0f4PpDsHkjp9H29Q7NP_4YxIZuDwAY5o-dXsDk9OfDg</recordid><startdate>200702</startdate><enddate>200702</enddate><creator>Kaye, Gerry</creator><creator>Edgar, Deborah</creator><creator>Mudawi, Telal</creator><creator>Lippert, Michael</creator><creator>Czygan, Gerald</creator><general>Oxford University Press</general><general>Oxford Publishing Limited (England)</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7T5</scope><scope>H94</scope><scope>K9.</scope><scope>7X8</scope></search><sort><creationdate>200702</creationdate><title>Can transventricular intracardiac impedance measurement discriminate haemodynamically unstable ventricular arrhythmias in human?</title><author>Kaye, Gerry ; Edgar, Deborah ; Mudawi, Telal ; Lippert, Michael ; Czygan, Gerald</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c398t-ae4e6ab09a46b0ae20893d15dbfd5b17816c4d1d976248bcfa517284628b02d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Cardiac Pacing, Artificial</topic><topic>Cardiography, Impedance - methods</topic><topic>Electrocardiography</topic><topic>Female</topic><topic>Humans</topic><topic>Linear Models</topic><topic>Male</topic><topic>Middle Aged</topic><topic>Predictive Value of Tests</topic><topic>Sensitivity and Specificity</topic><topic>Tachycardia, Ventricular - diagnosis</topic><topic>Tachycardia, Ventricular - physiopathology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kaye, Gerry</creatorcontrib><creatorcontrib>Edgar, Deborah</creatorcontrib><creatorcontrib>Mudawi, Telal</creatorcontrib><creatorcontrib>Lippert, Michael</creatorcontrib><creatorcontrib>Czygan, Gerald</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Immunology Abstracts</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>MEDLINE - Academic</collection><jtitle>Europace (London, England)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Kaye, Gerry</au><au>Edgar, Deborah</au><au>Mudawi, Telal</au><au>Lippert, Michael</au><au>Czygan, Gerald</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Can transventricular intracardiac impedance measurement discriminate haemodynamically unstable ventricular arrhythmias in human?</atitle><jtitle>Europace (London, England)</jtitle><addtitle>Europace</addtitle><date>2007-02</date><risdate>2007</risdate><volume>9</volume><issue>2</issue><spage>122</spage><epage>126</epage><pages>122-126</pages><issn>1099-5129</issn><eissn>1532-2092</eissn><abstract>Aims To measure changes in transventricular impedance during arrhythmias.
Methods and results Patients were studied during electrophysiological studies. A quadrapolar catheter was positioned at the right ventricular apex (RVA) and a decapolar catheter within the coronary sinus (CS). Transventricular impedance was measured by injecting a subthreshold biphasic rectangular pulse of 600 µ A between poles 1 of the CS catheter and pole 1 of the RVA catheter and the voltage measured between CS pole 10 and RVA catheter pole 4. Stroke impedance (SZ), surface ECG, intracardiac electrogram (IEGM), and invasive femoral artery blood pressure (FAP) were recorded. Twenty-eight patients were analysed, 5 with inducible, haemodynamically unstable ventricular tachycardia (VT) (HUSVT), 5 with stable VT (HSVT). During HUSVT, the SZ value reduced to 22% (range 0.15-0.32 P < 0.001) in comparison with sinus rhythm. For HSVT, the SZ value reduced to 58% (range 0.33-0.88) P < 0.01, significantly different from HUSVT (P < 0.01). There was a good correlation between reduction of SZ and arterial pulse pressure (PP) during arrhythmias (r = 0.95).
Conclusion Changes in SZ strongly correlated with PP amplitude. Transventricular impedance fell significantly during unstable arrhythmias and may be useful as a sensor capable of haemodynamic discrimination.</abstract><cop>England</cop><pub>Oxford University Press</pub><pmid>17272334</pmid><doi>10.1093/europace/eul150</doi><tpages>5</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Cardiac Pacing, Artificial Cardiography, Impedance - methods Electrocardiography Female Humans Linear Models Male Middle Aged Predictive Value of Tests Sensitivity and Specificity Tachycardia, Ventricular - diagnosis Tachycardia, Ventricular - physiopathology |
| title | Can transventricular intracardiac impedance measurement discriminate haemodynamically unstable ventricular arrhythmias in human? |
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