What are the diagnostic criteria for postural orthostatic tachycardia syndrome (POTS)?

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Last updated: October 15, 2026 • View editorial policy

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POTS Diagnostic Criteria

To diagnose POTS, you must document both excessive orthostatic tachycardia (≥30 bpm heart rate increase in adults >19 years or ≥40 bpm in adolescents 12-19 years within 10 minutes of standing) AND chronic orthostatic symptoms that improve with recumbence, persisting for at least 3 months, without orthostatic hypotension. 1

Core Hemodynamic Criteria

The hemodynamic threshold is straightforward and non-negotiable:

  • Adults ≥20 years: Sustained heart rate increase ≥30 bpm from supine to upright within 10 minutes of standing
  • Adolescents 12-19 years: Sustained heart rate increase ≥40 bpm from supine to upright within 10 minutes of standing
  • No orthostatic hypotension: Blood pressure must NOT drop by ≥20 mmHg systolic or ≥10 mmHg diastolic 1, 2

The heart rate increase must be sustained throughout the 10-minute standing period, not just a transient spike. Some older criteria mentioned heart rate >120 bpm as an alternative threshold, but the increment from baseline is the primary criterion 1.

Symptom Criteria

Predominant and bothersome orthostatic symptoms must be present, with most or all improving when lying down. These symptoms must dominate the clinical presentation 1. There is no specific cardinal symptom required, nor a minimum number of symptoms needed—the key is that orthostatic intolerance is the primary complaint.

Common orthostatic symptoms include:

  • Lightheadedness or dizziness when standing
  • Palpitations
  • Tremulousness
  • Generalized weakness
  • Blurred vision
  • Fatigue
  • Exercise intolerance
  • Cognitive dysfunction ("brain fog")
  • Nausea 1, 2

Duration Requirement

Both hemodynamics and symptoms must be chronic, persisting for at least 3 months before making the diagnosis 1. This temporal requirement distinguishes POTS from acute conditions causing transient orthostatic tachycardia.

Critical Exclusions

Before diagnosing POTS, you must exclude secondary causes of orthostatic tachycardia:

  • Dehydration or severe hypovolemia
  • Prolonged bedrest (deconditioning)
  • Medications causing tachycardia (stimulants, norepinephrine reuptake inhibitors, diuretics)
  • Thyroid disease (hyperthyroidism)
  • Adrenal insufficiency
  • Pheochromocytoma
  • Anemia
  • Cardiac conditions (cardiomyopathy, valvular disease, congenital heart disease)
  • Chronic lung disease 1, 2

If any of these conditions are present and explain the tachycardia, the patient has postural tachycardia of other cause (PTOC), not POTS 1.

Related Diagnostic Categories

The 2020 Canadian Cardiovascular Society guidelines introduced a refined classification system 1:

POTS Plus

Meets all POTS criteria PLUS has additional debilitating noncardiovascular symptoms such as:

  • Severe gastroparesis or gastrointestinal dysmotility
  • Neurogenic bladder
  • Severe chronic pain
  • Joint hypermobility
  • Intractable headaches
  • Significant flushing/anaphylaxis symptoms
  • Neurological symptoms (paresthesias, neuropathic pain) 1

Postural Symptoms Without Tachycardia (PSWT)

Meets symptom criteria but does not meet hemodynamic criteria—these patients should NOT be diagnosed with POTS 1.

Common Diagnostic Pitfalls

Do not confuse POTS with inappropriate sinus tachycardia (IST). IST has a different hemodynamic pattern—tachycardia is present both supine and upright, not just orthostatic. IST patients have elevated resting heart rates even when lying down, whereas POTS patients typically have normal supine heart rates 1.

Do not diagnose POTS in patients with orthostatic hypotension. If blood pressure drops significantly with standing, consider orthostatic hypotension or neurogenic orthostatic hypotension instead 1, 2.

Recognize that 30-40% of POTS cases begin within 3 months after infections (SARS-CoV-2, Epstein-Barr virus, influenza), which is important for clinical context but doesn't change diagnostic criteria 2.

Testing Approach

Perform an active standing test or head-up tilt table test:

  1. Measure supine heart rate and blood pressure after 5-10 minutes of rest
  2. Have patient stand (or tilt to 70-80 degrees)
  3. Measure heart rate and blood pressure at 1,3,5, and 10 minutes
  4. Document symptoms during the test
  5. Calculate the maximum heart rate increase from baseline 1, 2, 3

The active standing test is sufficient for diagnosis in most cases and doesn't require specialized tilt table equipment 3.

References

3
Research

Approach to Postural Orthostatic Tachycardia Syndrome.

Neurology. Clinical practice, 2026

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