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The Journal of Thoracic and Cardiovascular Surgery, Vol 70, 666-676, Copyright © 1975 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association
EA Stemmer, I Joy, WS Aronow, W Thibault, P McCart and JE Connolly
This study compares the effects of 2 hour periods of normothermic anoxic
arrest, continuous normothermic coronary perfusion, continuous cold
coronary perfusion, and topical cooling of the ischemic myocardium on
survival and ultramicroscopic structure of the canine myocardium. No animal
survived 2 hours of normothermic anoxic arrest. Severe ultrastructural
damage was observed in the nuclei, mitochondria, and myofibrils. Topical
cooling of the ischemic myocardium to 15 degrees C. markedly improved
survival and preservation of the myocardial fine structure. Continuous
perfusion of the coronary arteries with cold blood resulted in 100 per cent
survival through the experimental period, with preservation of the normal
myocardial ultrastructure. The technique of cold coronary perfusion should
be particularly useful in cardiac surgical patients in whom maximal
preservation of myocardial function is essential for survival.
ARTICLES
Preservation of myocardial ultrastructure
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