G90.8

Clinical Causes: Idiopathic (unknown origin) Neurological diseases such as Parkinson's or multiple system atrophy Diabetic autonomic neuropathy Autoimmune disorders that attack autonomic nerves Trauma or injury to the nervous system Infections affecting nervous tissue Certain medications or toxins Genetic predispositions

Key Symptoms: Dizziness or lightheadedness upon standing Unusual blood pressure fluctuations Digestive problems, including nausea, bloating, or constipation Heart rate irregularities, such as rapid or slow heartbeat Excessive sweating or lack of sweating (anhidrosis) Difficulty regulating body temperature, resulting in heat intolerance or sweating episodes Blurry vision or blackouts Fatigue and weakness Sensory abnormalities, such as tingling or numbness Urinary or bowel dysfunction

Diagnosis Path: Diagnosis involves a comprehensive medical history, physical examination, and specialized tests aimed at assessing autonomic function. These tests may include tilt table testing, sweat testing, and heart rate variability assessments. Sometimes, additional tests like blood work or imaging are performed to identify underlying causes or rule out other conditions. Because symptoms can be similar to those of other disorders, accurate diagnosis often requires consultation with specialists experienced in autonomic nervous system disorders.

Treatment Protocols: Medications to regulate blood pressure, heart rate, or other specific symptoms Lifestyle modifications such as increased salt intake and fluid consumption Physical therapy and exercises to improve circulation and orthostatic tolerance Managing underlying conditions like diabetes or autoimmune diseases Use of compression garments to prevent blood pooling Education on how to manage episodes of dizziness or other symptoms In some cases, neurostimulation techniques may be considered