This study was designed to determine the pathophysiological abnormality in patients with orthostatic hypertension. Methods will include measurement of arteriolar responsiveness to norepinephrine, determination of alpha-2 adrenergic receptor function by binding of triatiated yohimbine to platelets, and in vitro responsivenesss of segments of excised saphenous veins to norepinephrine.
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Breslau, N A; Weinstock, R S (1988) Regulation of 1,25 (OH)2D synthesis in hypoparathyroidism and pseudohypoparathyroidism. Am J Physiol 255:E730-6 |
Haas, D C; Anderson Jr, G H; Streeten, D H (1985) Role of angiotensin in lethal cerebral hypoperfusion during treatment of acute hypertension. Arch Intern Med 145:1922-4 |