Key result
The inferior epigastric artery had lower combined media and intima thickness (0.20 vs 0.30 mm) than the internal thoracic artery, but 24% of IEAs showed medial calcification.
Why the study?
Does the morphology of the inferior epigastric artery support its routine use as a conduit for myocardial revascularization compared to the internal thoracic artery?
Observational (n=45)
Does the morphology of the inferior epigastric artery support its routine use as a conduit for myocardial revascularization compared to the internal thoracic artery?
The inferior epigastric artery exhibits medial calcification in 24% of cases, suggesting it should not be used routinely for myocardial revascularization until long-term patency is established.
Answers are grounded in this paper and cite their sources.
Medial calcification in IEAs warrants caution against routine conduit use; leaves open prospective patency trials versus ITA.
The inferior epigastric artery (IEA) is a new arterial graft for myocardial revascularization. We examined the inferior epigastric artery, the internal thoracic artery (ITA) and representative sections of the coronary arteries in 45 postmortem examinations, for microscopic signs of atherosclerosis. In addition, a morphometric evaluation of the intima and media of both conduits was performed. The intima of the ITA is significantly thicker, but atherosclerosis is absent. There are fewer fenestrations/mm in the internal elastic lamina (IEL) (4.00 +/- 1.60 versus 4.62 +/- 1.46) of the IEA and the combined thickness of media and intima is lower (0.20 +/- 0.04 mm versus 0.30 +/- 0.06 mm). However, 24% of IEAs showed medial calcification of variable degrees. We conclude that the IEA should not be used routinely for myocardial revascularization until the long-term patency of this graft has been explored.
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Wahba et al. (1994) conducted an observational in Myocardial revascularization conduits (n=45). Inferior epigastric artery vs. Internal thoracic artery was evaluated on Microscopic signs of atherosclerosis and morphometric evaluation of the intima and media. The inferior epigastric artery had lower combined media and intima thickness (0.20 vs 0.30 mm) than the internal thoracic artery, but 24% of IEAs showed medial calcification.
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