Document Detail


Coronary collateral growth--back to the future.
MedLine Citation:
PMID:  22210280     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The coronary collateral circulation is critically important as an adaptation of the heart to prevent the damage from ischemic insults. In their native state, collaterals in the heart would be classified as part of the microcirculation, existing as arterial-arterial anastomotic connections in the range of 30 to 100 μM in diameter. However, these vessels also show a propensity to remodel into components of the macrocirculation and can become arteries larger than 1000 μM in diameter. This process of outward remodeling is critically important in the adaptation of the heart to ischemia because the resistance to blood flow is inversely related to the fourth power of the diameter of the vessel. Thus, an expansion of a vessel from 100 to 1000 μM would reduce resistance (in this part of the circuit) to a negligible amount and enable delivery of flow to the region at risk. Our goal in this review is to highlight the voids in understanding this adaptation to ischemia-the growth of the coronary collateral circulation. In doing so we discuss the controversies and unknown aspects of the causal factors that stimulate growth of the collateral circulation, the role of genetics, and the role of endogenous stem and progenitor cells in the context of the normal, physiological situation and under more pathological conditions of ischemic heart disease or with some of the underlying risk factors, e.g., diabetes. The major conclusion of this review is that there are many gaps in our knowledge of coronary collateral growth and this knowledge is critical before the potential of stimulating collateralization in the hearts of patients can be realized. This article is part of a Special Issue entitled "Coronary Blood Flow".
Authors:
William M Chilian; Marc S Penn; Yuh Fen Pung; Feng Dong; Maritza Mayorga; Vahagn Ohanyan; Suzanna Logan; Liya Yin
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Review     Date:  2011-12-19
Journal Detail:
Title:  Journal of molecular and cellular cardiology     Volume:  52     ISSN:  1095-8584     ISO Abbreviation:  J. Mol. Cell. Cardiol.     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-03-16     Completed Date:  2012-07-12     Revised Date:  2014-09-22    
Medline Journal Info:
Nlm Unique ID:  0262322     Medline TA:  J Mol Cell Cardiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  905-11     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier Ltd. All rights reserved.
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MeSH Terms
Descriptor/Qualifier:
Collateral Circulation / physiology*
Coronary Artery Disease / physiopathology,  therapy
Coronary Circulation / physiology
Humans
Myocardial Ischemia / physiopathology,  therapy
Neovascularization, Physiologic / physiology
Grant Support
ID/Acronym/Agency:
HL100828Z/HL/NHLBI NIH HHS; HL32788/HL/NHLBI NIH HHS; HL83366/HL/NHLBI NIH HHS; R01 HL032788/HL/NHLBI NIH HHS; R01 HL032788-22/HL/NHLBI NIH HHS; R01 HL083366/HL/NHLBI NIH HHS; R01 HL083366-04/HL/NHLBI NIH HHS; RC1 HL100828/HL/NHLBI NIH HHS; RC1 HL100828-02/HL/NHLBI NIH HHS
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