Deep dive #5 Β· 7 November 2026

POTS

For health professionals General practice

A young woman, a racing heart on standing, years of "it's anxiety" and an average of five doctors before anyone measures her pulse lying and standing. Postural orthostatic tachycardia syndrome is diagnosed with a watch and a bed, managed mostly in general practice, and surrounded by more hype than trials. Criteria, a stand test you can run on Monday, and an honest read of the evidence.

At a glance

Biggest take-home: measure lying and standing heart rate before you write "anxiety" in the notes.

For patients, in one line: POTS makes your heart race and you feel unwell when you stand, it's diagnosed with a simple lying-and-standing test, and most people improve with a steady plan. Read the plain-English POTS page.

Definition

What it isn't

History

Pathophysiology

Mostly hypotheses. Phenotypes overlap, and none has a validated test that changes treatment for most patients.

Epidemiology

Global

Australia

Triggers and associations

Association is not causation. Each line says how strong the evidence is.

Assessment in general practice

History and examination

The active stand test, step by step

  1. Prepare. Morning testing is more sensitive. Note rate-slowing and vasoactive medicines, caffeine and recent fluid intake. Have a chair and a second person nearby.
  2. Lie supine for 5–10 minutes. Record heart rate and blood pressure at the end.
  3. Stand up unaided, feet slightly apart, without leaning, and minimise talking and fidgeting.
  4. Record HR and BP at 1, 3, 5, 8 and 10 minutes (the CMAJ protocol). PoTS UK suggests every 2 minutes for 10 minutes; either is fine.
  5. Record symptoms and signs at each point: lightheadedness, palpitations, colour change in the legs, tremor.
  6. Stop and lie the patient down if they become presyncopal. Record the values at that point.
  7. Interpret. Sustained rise β‰₯30 bpm (β‰₯40 at 12–19) on at least 2 readings; no sustained fall β‰₯20/10 mmHg within 3 minutes. A BP rise on standing points towards a hyperadrenergic picture.
  8. If negative but the story is strong, repeat on another morning, off caffeine, before referring for a tilt test.

What to exclude

Basic investigations

Red flags: refer urgently or rethink the diagnosis

When to refer routinely

Current treatment

First: education and non-drug care

Then: medicines (all off-label for POTS)

No medicine is TGA-registered or PBS-listed for POTS. No large multicentre RCT supports any of them. Start one at a time, low, and stop if there's no benefit. Use specialist input for combinations or pregnancy.

A lower heart rate is a number. A patient who can stand in a supermarket queue is an outcome. Trials, and clinicians, should count the second.

Emerging treatments and trials

Special groups

Adolescents

Pregnancy

Prognosis and quality of life

Talking to patients

Myths

Gaps and open questions

Labelled hypotheses, not recommendations.

What to do on Monday

Weird trivia

Guidelines

Key trials and studies

Sources

Information only. All POTS medicines are off-label. Check product information, PBS status, contraindications and specialist advice before prescribing, and follow local referral pathways.

Reviewed 7 November 2026. General education for health professionals; not a substitute for local protocols or clinical judgement.