clar697
Forum Guru
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A 49-year-old woman with chronic coronary artery disease undergoes coronary arteriography that shows a 50% decrease in the lumen of the left anterior descending coronary artery. For any arteriovenous pressure gradient, the flow through this artery (compared with normal) with decrease by a factor of which of the following?
A) 2
B) 4
C) 8
D) 16
E) 32
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| match2010
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D ?
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| usmlekiller
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D
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| supra
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D
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| clar697
Forum Guru
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Can you explain?
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| pursuit
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flow is inversely proportional to 4th power of radius of a vessel...so if radius =1/2... then flow will increase by (2 into 2 into 2 into 2 into 2 ) equals 16!
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