Disorders of orthostatic tolerance

Definition

Disorders characterized by symptomatic arterial hypotension (lightheadedness, fatigue) when assuming an upright position usually due to dysfunction of adrenergic regulation.

6 subordinate codes

• 8D89.0Reflex syncope
• 8D89.1Syncope due to autonomic failure
• 8D89.2Postural orthostatic tachycardia syndrome
• 8D89.3Baroreflex failure
• 4B4YOther specified diseases of the immune system
• 4B4ZDiseases of the immune system, unspecified

Nearby in Disorders of autonomic nervous system

• 8D80Congenital malformations of the autonomic nervous system
• 8D81Inherited autonomic nervous system disorders
• 8D82Autoimmune disorders involving the autonomic nervous system
• 8D83Autonomic nervous system disorder due to infection
• 8D84Pure autonomic nervous system failure
• 8D85Autonomic nervous system disorder due to substances
• 8D86Autonomic nervous system hyperactivity
• 8D87Autonomic nervous system disorder due to certain specified neurodegenerative disorder