| Dependence of canine right coronary arterial flow upon heart rate and right ventricular pressure. | |
| | |
MedLine Citation:
|
PMID: 7572144 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
There is a paucity of knowledge regarding right coronary pulsatile hemodynamics when the right ventricle is under hemodynamic overload as is often the case in pediatric patients with congenital cardiac anomalies. To elucidate the exact mechanisms for the right coronary artery (RCA) to cope with the overload, we studied nine open-chest adult Beagles and analyzed the flow signals of the RCA in relation to independently varied heart rate (pacing) and right ventricular pressure (pulmonary artery banding). Both increased heart rate and right ventricular pressure increased the total volume flow of the RCA. The diastolic over total flow ratio (D/T), however, enlarged on increasing right ventricular pressures while it declined on increasing heart rates. Our data confirmed, as well, that increased flow of RCA on rising heart rate was provided mainly by an increase in systolic phase, while the increase on augmented right ventricular pressure was provided by the increase in diastolic phase. The RCA manages to deliver blood to the right ventricular musculature in two different ways in response to increasing heart rate and right ventricular pressure. |
| | |
Authors:
|
N Oki; S Awa |
Related Documents
:
|
2360664 - Phasic regional myocardial inflow and outflow: comparison of theory and experiments. 2888794 - The effect of beta blockers on cardiac neural discharge associated with coronary occlus... 1269134 - Experimental myocardial infarction. xiii. sequential changes in left ventricular pressu... 11790704 - Detection of noncritical coronary stenosis at rest without recourse to exercise or phar... 2647104 - Noradrenaline release and the pathophysiology of primary human hypertension. 2977164 - Effect of atrial natriuretic factor on arterial baroreceptor control of heart rate and ... |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Acta paediatrica Japonica; Overseas edition Volume: 37 ISSN: 0374-5600 ISO Abbreviation: Acta Paediatr Jpn Publication Date: 1995 Aug |
Date Detail:
|
Created Date: 1995-11-20 Completed Date: 1995-11-20 Revised Date: 2003-11-14 |
Medline Journal Info:
|
Nlm Unique ID: 0370357 Medline TA: Acta Paediatr Jpn Country: AUSTRALIA |
Other Details:
|
Languages: eng Pagination: 450-7 Citation Subset: IM |
Affiliation:
|
Department of Pediatrics, Kyorin University School of Medicine, Tokyo, Japan. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Coronary Circulation* Diastole Dogs Heart Rate* Systole Ventricular Pressure* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Acquired cytomegalovirus infection and blood transfusion in preterm infants.
Next Document: Long-term prognosis and prognostic factors of Japanese children with mesangial proliferative glomeru...