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The Annals of Thoracic Surgery, Vol 21, 318-321, Copyright © 1976 by The Society of Thoracic Surgeons
R Zajtchuk, WH Heydorn, JG Miller, TE Strevey and RL Treasure
Fifty-six dogs were used in a study to evaluate perfusion of the left
anterior descending vein by the internal mammary artery in hearts with
normal coronary arteries and those with ligated desending coronary
arteries. Perfusion of the myocardium with arterial blood through the
cardiac veins offers minimal immediate protection from infarction, as
evidenced by light and electron microscopy studies. This protection is of
short duration due to intimal fibrosis and luminal stenosis or obstruction
of the perfused veins. Nineteen animals in which the coronary vein was
perfused and the corresponding coronary artery was not ligated died within
sixty hours from the time of operation. Pathological examination revealed
patent grafts in all the animals. There was marked congestion of the
myocardium with petechial hemorrhages over the surface of the heart. No
evidence of myocardial infarction was found.
ARTICLES
Revascularization of the heart through the coronary veins
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