Abstract
The internal mammary artery is considered the best available conduit for coronary artery bypass grafting. The high long-term patency rate of mammary artery grafts as opposed to saphenous vein grafts seems to result from favorable biologic properties that could protect this vessel against atherosclerosis. Recent studies have emphasized the role of endothelium in triggering or modulating mechanisms controlling the growth, metabolism and contractile status of smooth muscle cells. Endothelial cells produce several vasoconstrictor agents such as thromboxane and endothelin and vasodilators among which prostacyclin and endothelium-derived relaxing factor or nitric oxide. In addition to their effects on vasomotor tone, these agents influence platelet adhesion and aggregation that may be implicated in atherogenesis. Differences exist among different vessels in the amount of nitric oxide released in basal conditions, in the agents stimulating its production and in the sensitivity of vascular smooth muscle to that factor [1–4]. Similarly, various areas of the vascular system are different in their ability to produce prostacyclin [5].
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Hanet, C., Dion, R., Wijns, W. (1994). Angiographic evaluation of coronary bypass grafts vasomotion. In: Serruys, P.W., Foley, D.P., De Feyter, P.J. (eds) Quantitative Coronary Angiography in Clinical Practice. Developments in Cardiovascular Medicine, vol 145. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-8358-9_20
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DOI: https://doi.org/10.1007/978-94-015-8358-9_20
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