What is dysautonomia?
Dysautonomia is dysfunction of the autonomic nervous system — affecting blood pressure, heart rate, digestion, sweating and other involuntary functions.
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POTS
Postural Orthostatic Tachycardia Syndrome causes rapid heart rate on standing (>30 bpm) with dizziness, fatigue and brain fog — often misdiagnosed as anxiety.
Evaluation and treatment
Orthostatic vitals, tilt-table testing, autonomic function tests. Treatment: hydration, salt, compression, exercise reconditioning, medications (midodrine, fludrocortisone, beta-blockers).