| Observations on coronary collateral communications and the control of flow in the coronary circulation of the dog. | |
| | |
MedLine Citation:
|
PMID: 5499785 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
1. Pressure was measured in the small arterial anastomosing branches of the coronary vascular network. The mean value was 30 mm Hg not significantly different from the mean value of 33 mm Hg for peripheral coronary pressure measured distal to a ligature on the anterior descending branch of the left coronary artery. Evidence was adduced to show that either the anterior descending or the circumflex artery had the capacity to maintain network pressure at levels adequate for tissue perfusion.2. The network has both capacity and compliance. Filling of the network compliance during systole probably accounts for the systolic phase of coronary flow. Flow through the microcirculation is probably entirely diastolic, the combined compliance of the aorta and large vessels together with the network provides the necessary reservoir, the potential energy indicated by diastolic pressure provides the perfusion pressure head.3. Resistance of vessels between the aorta and network cannula (pre-net) was approximately double that of the microcirculation (post-net). The smaller pre-network vessels are of the order 70 mum in diameter. Both pre- and post-network vessels are vaso-active and respond similarly to adrenaline and haemorrhage. |
| | |
Authors:
|
R L Coulson; J Gryson; M Irvine |
Related Documents
:
|
8353885 - Tone-dependent coronary arterial-venous pressure differences at the cessation of venous... 21228825 - Masked hypertension in young patients after successful aortic coarctation repair: impac... 2087705 - Study of the correlation between the type a behavior pattern in patients with coronary ... 1373575 - Dipyridamole-induced capillary growth in normal and hypertrophic hearts. 7359715 - Hemodynamic effects of nitrous oxide administered during cardiac catheterization. 16721305 - Effect of prone positioning systems on hemodynamic and cardiac function during lumbar s... |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: The Journal of physiology Volume: 208 ISSN: 0022-3751 ISO Abbreviation: J. Physiol. (Lond.) Publication Date: 1970 Jul |
Date Detail:
|
Created Date: 1971-03-31 Completed Date: 1971-03-31 Revised Date: 2009-11-18 |
Medline Journal Info:
|
Nlm Unique ID: 0266262 Medline TA: J Physiol Country: ENGLAND |
Other Details:
|
Languages: eng Pagination: 563-81 Citation Subset: IM |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Aorta / physiology Arteries Blood Pressure Collateral Circulation* Coronary Vessels / drug effects, physiology*, physiopathology |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The metabolism of (3H)noradrenaline released by electrical stimulation from the isolated nictitating...
Next Document: Rigor contraction and the effect of various phosphate compounds on glycerinated insect flight and ve...