Why Does POTS Take So Long to Diagnose?
If you have been told your racing heart is "just anxiety", you are far from the only one.
Postural Orthostatic Tachycardia Syndrome (POTS) is an autonomic nervous system condition. It affects how your body manages heart rate and blood flow when you stand up. Yet the road to a diagnosis is often long, frustrating and lonely.
How long does it actually take?
These figures come from a 2025 Australian registry of 500 people with physician-confirmed POTS, based at one Adelaide clinic and published in the Medical Journal of Australia:
The average wait from first symptoms to diagnosis was 6.7 years.
One in four people (25.5%) waited more than ten years.
Women waited longer than men: 7.0 years compared with 3.8 years.
The authors noted that this is longer than delays reported overseas.
There is encouraging news too. People diagnosed since 2019 reported much shorter waits, averaging 1.6 years. That figure cannot yet include those who are still searching for answers, but awareness is moving in the right direction.
Why does it take so long?
Symptoms are scattered. A racing heart, dizziness, brain fog, gut issues, fatigue and temperature problems are often sent to different clinicians, each looking at one piece.
The key test is rarely done. Most appointments happen sitting or lying down. Resting heart rate and routine blood tests can look normal.
It overlaps with anxiety. Palpitations, lightheadedness and a pounding heart show up in both.
A racing heart can look like anxiety, but it is not always the same thing. When the underlying cause is the autonomic nervous system, anxiety management alone does not address it.
Essentially, POTS is a problem that shows up when you stand, and most consultations happen sitting down.
What a diagnosis looks for
A doctor confirms the diagnosis, often with a cardiologist involved to rule out other causes. The core finding is a sustained heart rate increase of at least 30 beats per minute within 10 minutes of standing (at least 40 for ages 12 to 19), without a significant drop in blood pressure, alongside ongoing symptoms on standing.
A 10-minute active stand test or a tilt table test can measure this.
Making the most of your appointment
Write a short timeline: when symptoms began, and anything that preceded them, such as a viral illness, surgery or concussion.
Note what changes when you are upright versus lying down.
If it is safe for you, record your heart rate lying down and again after standing for 10 minutes, with someone nearby and a chair within reach, then bring the readings. If you tend to faint, ask your doctor to run this test instead.
Ask whether an active stand test or tilt table test is appropriate for you.
Autonomic testing can also add objective data that you can share with your GP or cardiologist.
Being dismissed for years says nothing about whether your symptoms are real. Worth saving for the appointment where the words don’t come easily.
Reference: Symptom burden, quality of life, and diagnostic journey of people with postural orthostatic tachycardia syndrome, Australia, 2021–24: a descriptive patient registry data study. Med J Aust 2025;223(3).
