Anatomy. Right coronary artery. Left coronary artery. Question 1: Which of the following regarding the coronary collateral circulation is true?. Collaterals are often demonstrated by angiography in coronary arteries with 80% stenoses Collaterals usually take several days to manifest angiographically after acute MI Collaterals represent the formation of new vessels as opposed to the utilization of existing blood vesselsCoronary collaterals can dilate in response to nitrates and beta-adrener9446
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