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FIG 3. Line diagram representing mean blood pressure drops across the theoretical AVM according to position within the circulation. At normotension, mean systemic pressure is 74 mm Hg. When systemic hypotension is induced in the circulation, the mean systemic pressure falls to 70 mm Hg (minor hypotension), 50 mm Hg (moderate hypotension), or 25 mm Hg (profound hypotension)
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