Quick Answer
POTS causes rapid heart rate on standing (>30 bpm) with dizziness and fatigue — often misdiagnosed as anxiety. It's treatable.
Medically reviewed by Dr. Jitendra Prasad Yadav • NMC 8029 • Kathmandu Neurology Clinic & Cognitive Center
Postural Orthostatic Tachycardia Syndrome (POTS) is a form of dysautonomia — dysfunction of the autonomic nervous system that regulates blood pressure, heart rate and other involuntary functions. In POTS, standing causes an excessive heart rate increase (>30 bpm in adults, >40 in adolescents) with symptoms of cerebral hypoperfusion — dizziness, lightheadedness, brain fog, fatigue — often without a significant blood pressure drop.
Symptoms
Rapid heartbeat on standing (palpitations), dizziness/lightheadedness on standing, brain fog and difficulty concentrating, fatigue (often severe), exercise intolerance, heat intolerance, nausea, sweating abnormalities. Symptoms improve with lying down. Many patients are misdiagnosed with anxiety or panic disorder.
Diagnosis
Active stand test or tilt-table test: heart rate increase >30 bpm (or >40 in adolescents) within 10 minutes of standing, without significant blood pressure drop (>20/10 mmHg). Exclusion of hyperadrenergic states, dehydration, anemia and medication effects. Many cases follow viral illness or are associated with Ehlers-Danlos syndrome.
Treatment
Increase fluid and salt intake (2–3L water, 3–5g salt daily). Compression garments (waist-high stockings). Gradual exercise reconditioning (recumbent bike, swimming). Medications: midodrine, fludrocortisone, beta-blockers (low dose), ivabradine. Avoid triggers: heat, alcohol, large meals, prolonged standing.
When to seek professional evaluation
POTS is diagnosed with tilt-table or active stand testing — because it is often misdiagnosed as anxiety and requires specific treatment.
This guide is educational and does not replace individual medical advice.
Frequently asked questions
Answers reviewed by Dr. Jitendra Prasad Yadav • MBBS, MD (Internal Medicine), FICN (Neurology), FCNV, FIHM • NMC 8029
Cervical sensations can coexist, but dizziness is often multifactorial and needs systematic assessment rather than assuming a single neck cause.
Yes; vertigo is the sensation of spinning. Dizziness is a broader term including lightheadedness, unsteadiness, and near-fainting. Different causes underlie each.
Migraine is a neurological condition; headache is one feature. Associated symptoms and functional impact are important for diagnosis.
Aura refers to visual, sensory, or speech symptoms that precede the headache in some people. Both types are migraine; the presence of aura may influence management discussion.
Vertigo is spinning. Dizziness is broader — lightheaded, faint, unsteady. Vertigo often indicates vestibular dysfunction (inner ear or brain) and is typically triggered by head position change, while lightheadedness often reflects blood pressure, dehydration, or medication effects. Duration and triggers guide evaluatio…
More: All FAQs → · Ask Dr. Jitendra →
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References & Review
Reviewed by Dr. Jitendra Prasad Yadav • Last reviewed: 2026-11-10
- International Classification of Headache Disorders, 3rd edition (ICHD-3).
- Harrison's Principles of Internal Medicine — Neurology sections.
- American Academy of Neurology guidelines for selected conditions (where applicable).
Content is educational and aligns with standard medical references; individual evaluation may vary. External links provide context and do not imply endorsement.