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What are falsely elevated less frequently than tibial ankle pressures? {Ans: Toe pressures.}Define ischemia. {Ans: A decrease in the blood supply to a bodily organ, tissue, or part caused by constriction or obstruction of the blood vessels.}In the United States, the most common cause of portal hypertension is ? {Ans: Cirrhosis.}What is the normal diameter for the abdominal aorta? {Ans: 2-3 cm.}The common radiologic terms "inflow", "outflow" and "runoff" refer respectively to what? {Ans: Aortoiliac, femoropopliteal and trifurcation arteries.}A congenital arteriovenous fistula involves ___________________. {Ans: A multitude of arteriovenous channels.}T or F- Bleeding esophageal varices is a common manifestation of portal hypertension. {Ans: True.}A normal arterial volume waveform may have all EXCEPT: Swift upstroke, sharp peak, rapid downslope bowed toward baseline, dicrotic notch or reverse flow component? {Ans: Reverse flow component because it is part of a Doppler waveform not volume waveform.}T ot F- the digital/brachial systolic pressure ratio in an extremity with a dialysis fistula is about 0.5. {Ans: False. You shouldn't take a blood pressure where there is a dialysis fistula.}What is digital subtraction arteriography? {Ans: a method in which radiographic images of blood vessels filled with contrast