Physiological mechanism underlying mr. nelsons dizziness

Reference no: EM133645340

Question

Mr. Nelson is a 67-year-old retired insurance salesman with a 2-day history of dizziness. He describes a lightheaded sensation as though he is about to pass out that occurs whenever he is standing or walking. He has a milder sensation in the sitting position and is completely relieved when he lies down. There is no sense of spinning accompanying this sensation. What is the likely physiological mechanism underlying Mr. Nelson's dizziness?

Reference no: EM133645340

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