Coronary blood flow changes during atrioventricular sequential pacing with different atrioventricular delays in normal individuals

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dc.contributor.authorKyriakides, Z. S.en
dc.contributor.authorKolettis, T. M.en
dc.contributor.authorPopov, T.en
dc.contributor.authorMesiskli, T.en
dc.contributor.authorTriantafillou, K.en
dc.contributor.authorKremastinos, D. T.en
dc.date.accessioned2015-11-24T19:27:05Z
dc.date.available2015-11-24T19:27:05Z
dc.identifier.issn1383-875X-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/22780
dc.rightsDefault Licence-
dc.subjectAtrial Function, Right/physiologyen
dc.subjectAtrioventricular Node/*physiologyen
dc.subjectBlood Flow Velocity/physiologyen
dc.subjectBlood Pressure/physiologyen
dc.subject*Cardiac Pacing, Artificialen
dc.subjectCardiac Volume/physiologyen
dc.subjectCoronary Circulation/*physiologyen
dc.subjectCoronary Vessels/physiologyen
dc.subjectFemaleen
dc.subjectHeart Rate/physiologyen
dc.subjectHemodynamics/physiologyen
dc.subjectHumansen
dc.subjectMaleen
dc.subjectMiddle Ageden
dc.subjectMyocardial Contraction/physiologyen
dc.subjectSystoleen
dc.subjectTime Factorsen
dc.subjectUltrasonography, Doppleren
dc.subjectUltrasonography, Interventionalen
dc.subjectVentricular Function, Left/physiologyen
dc.subjectVentricular Pressure/physiologyen
dc.titleCoronary blood flow changes during atrioventricular sequential pacing with different atrioventricular delays in normal individualsen
heal.abstractThis study examined the effects of different atrioventricular (AV) intervals, during AV sequential pacing, on hemodynamics and coronary blood flow in individuals with normal hearts. Left anterior descending artery blood flow velocity was measured, using intracoronary Doppler, in 17 normal individuals. Five pacing tests were applied in random order for 5 min, at 15 beats/min above the sinus rate. Four tests using AV sequential pacing with AV intervals of 175, 150, 100, and 50 ms, and one using atrial pacing were applied. Mean flow velocity was 21 +/- 9 cm/s, 20 +/- 9 cm/s, 17 +/- 7 cm/s, 17 +/- 7 cm/s, and 22 +/- 10 cm/s, respectively (F = 8.87, p = .00001). The hemodynamic effects of these 5 pacing tests were assessed in 8 different normal subjects. Isovolumic relaxation time constant and left ventricular systolic pressure decreased, whereas right atrial pressure increased during AV sequential pacing with short AV intervals. Thus, during short-term AV sequential pacing at rest, coronary blood flow in a normal left anterior descending artery decreases with short AV intervals.en
heal.accesscampus-
heal.fullTextAvailabilityTRUE-
heal.identifier.secondaryhttp://www.ncbi.nlm.nih.gov/pubmed/9870008-
heal.identifier.secondaryhttp://www.springerlink.com/content/v6042462373671w1/fulltext.pdf-
heal.journalNameJ Interv Card Electrophysiolen
heal.journalTypepeer-reviewed-
heal.languageen-
heal.publicationDate1998-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών Υγείας. Τμήμα Ιατρικήςel
heal.typejournalArticle-
heal.type.elΆρθρο Περιοδικούel
heal.type.enJournal articleen

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