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The Annals of Thoracic Surgery, Vol 44, 4-6, Copyright © 1987 by The Society of Thoracic Surgeons
RW Landymore and DM Chapman
The internal mammary artery pedicle graft is frequently used for coronary
bypass. Five internal mammary artery pedicle grafts, harvested but not
utilized for coronary bypass, underwent histological examination. The
histological studies demonstrated that the vasa vasorum were confined to
the adventitia and did not penetrate the media of the internal mammary
artery. These observations indicate that the media is nourished entirely
from the lumen and suggest that harvesting the internal mammary artery as a
free graft would not subject the wall of the artery to ischemic injury.
Subsequent to these studies, we used the right internal mammary artery as a
free graft to revascularize the distal circumflex coronary artery in 12
patients. The free graft was anastomosed to marginal branches of the
circumflex and was then brought up to the left internal mammary artery
pedicle graft and anastomosed end-to-side. This procedure has not resulted
in excessive postoperative bleeding or sternal infections, and has relieved
the anginal syndrome in all 12 patients.
ARTICLES
Anatomical studies to support the expanded use of the internal mammary artery graft for myocardial revascularization
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