TITLE

STUDIES OF COLLATERAL VASCULAR RESPONSES I. EFFECTS OF SELECTIVE OCCLUSIONS OF MAJOR TRUNKS WITHIN AN EXTENSIVELY ANASTOMOSING ARTERIAL SYSTEM"

AUTHOR(S)
Bellman, Sven; Frank, Howard A.; Lambert, Peter B.; Roy, Albert J.
PUB. DATE
August 1959
SOURCE
Angiology;Aug1959 Part 1, Vol. 10 Issue 4, p214
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
With microangiography in vivo and postmortem, responses to arterial occlusions were investigated in the extensively anastomosing tri-arterial pattern of the rabbit's ear. Major components of this pattern were interrupted so as to produce alterations in flow pathways without depriving any tissue region of vascular supply. A symmetrical functional expansion of the two lateral arterial systems, produced by proximal interruption of the third artery, led to a progressive enlargement of the main trunks feeding these systems and usually only a limited enlargement of the fine collateral vessels connecting lateral and central arteries. An asymmetrical functional expansion, produced by double arterial interruption that established two unequal arterial systems, fed from a common source but having greatly different outflow capacities, led to a substantial widening of the trunk feeding the larger lateral system, a limited enlargement of collaterals within the larger system, and a progressive and consistent enlargement of the pre-existing collaterals connecting the two unequal systems. Direct bridging of the sites of arterial interruption by newly appearing vessels was inconstant and did not influence the responses of the pre existing collaterals. Development of new vessels was not detected elsewhere in the field of study.
ACCESSION #
16388517

 

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