Grafts used in Coronary Bypass surgery.

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The discussion centers on the use of the internal mammary artery (IMA) as the preferred graft for coronary artery bypass surgery, replacing the previously favored great saphenous vein (GSV). The IMA is noted for its resistance to atherosclerosis and a lifespan of up to 10 years as a graft. The query arises regarding the mechanisms that prevent atherosclerosis in the IMA, questioning whether this is related to perfusion or inherent properties that differentiate it from larger arteries like the aorta and coronary arteries. The conversation also touches on the tendency of grafts to develop atherosclerosis despite the IMA's advantages, particularly in the context of existing risk factors. The nature of the inquiry suggests it may relate to academic requirements.
Manish7
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Previously graft for coronary artery bypass was great saphenous vein (GSV) still being used,but now Internal mammary artery(IMA) is the graft of choice.
Because IMA doesn't atherosclerose at alland all the vessels of upper limb, and its life is upto 10years.
I need to put up query why it is that it doesn't atherosclerose, is it due to anything related to perfusion or it possesses any mechanism to avoid it which these large arteries such as aorta , coronary doesn't ?
When used as a graft it shows tendency to atherosclerose (as its life expectancy is 10 years), keeping in mind the major risk factors for atherosclerosis present.
 
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Is this a homework or coursework question?
 
I replied in the previous thread of mine.
 

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