| Coronary blood flow changes during atrioventricular sequential pacing with different atrioventricular delays in normal individuals. | |
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MedLine Citation:
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PMID: 9870008 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This 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. |
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Authors:
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Z S Kyriakides; T M Kolettis; T Popov; T Mesiskli; K Triantafillou; D T Kremastinos |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing Volume: 2 ISSN: 1383-875X ISO Abbreviation: J Interv Card Electrophysiol Publication Date: 1998 Jun |
Date Detail:
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Created Date: 1999-01-20 Completed Date: 1999-01-20 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9708966 Medline TA: J Interv Card Electrophysiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 163-9 Citation Subset: IM |
Affiliation:
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2nd Department of Cardiology, Onassis Cardiac Surgery Center, Athens, Greece. zskyr@otenet.gr |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Atrial Function, Right
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physiology Atrioventricular Node / physiology* Blood Flow Velocity / physiology Blood Pressure / physiology Cardiac Pacing, Artificial* Cardiac Volume / physiology Coronary Circulation / physiology* Coronary Vessels / physiology Female Heart Rate / physiology Hemodynamics / physiology Humans Male Middle Aged Myocardial Contraction / physiology Systole Time Factors Ultrasonography, Doppler Ultrasonography, Interventional Ventricular Function, Left / physiology Ventricular Pressure / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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