A Case of Neurogenic Orthostatic Hypertension.

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Abstract
A patient with orthostatic hypertension of neurogenic origin is reported. The Schellong and head-up tilt tests produced a sudden moderate to marked increase of the blood pressure, but the plasma renin activity and plasma aldosterone level showed a normal response. The cold pressor test also produced a moderate to marked increase in the blood pressure. Pharmacological cardiovascular autonomic nervous function tests showed a decrease of parasympathetic tone and denervation hypersensitivity of the sympathetic nerve terminals. These findings suggest that the orthostatic hypertension in this patient was mainly due to sympathetic denervation hypersensitivity.

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