Table 76.3Causes of Orthostatic Hypotension

Asympathicotonic—autonomic dysfunction; characterized by absent tachycardia
Primary dysautonomias
Secondary dysautonomias
Sympathetic inhibiting drugs (see Table 76.7)
Sympathicotonic—no autonomic dysfunction; characterized by tachycardia
Volume depletion
 Addison's disease
 Dehydration
 Hemorrhage
Vascular insufficiency
 Parade fainting
 Pregnancy
 Thermodilation
 Varicose veins
Deconditioning
 Loss of gravity forces
 Postinfectious
 Prolonged bed rest
Drug induced
 Alcohol vasodilation
 Diuretics
 Nitrates
Potassium depletion
Vasovagal reaction

From: Chapter 76, Clinical Evidence of Dysautonomia

Cover of Clinical Methods
Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd edition.
Walker HK, Hall WD, Hurst JW, editors.
Boston: Butterworths; 1990.
Copyright © 1990, Butterworth Publishers, a division of Reed Publishing.

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