Which of the following blood pressure readings indicates orthostatic hypotension?
A. BP lying down, 112/60 mm Hg; BP sitting up, 100/54 mm Hg
B. BP lying down, 116/66 mm Hg; BP standing up, 114/68 mm Hg
C. BP lying down, 122/82 mm Hg; BP sitting up, 118/78 mm Hg
D. BP lying down, 134/84 mm Hg; BP standing up, 136/72 mm Hg
Answer: A. BP lying down, 112/60 mm Hg; BP sitting up, 100/54 mm Hg
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