Getting a PoTS Diagnosis — PoTS Scotland

Step 1

Before your GP appointment

Being well prepared for a GP appointment about possible PoTS significantly improves the chances of being taken seriously and having an appropriate assessment initiated. PoTS is not widely taught in medical training, and the presenting symptoms — dizziness, palpitations, fatigue, brain fog — are common and non-specific. The more clearly you can describe the postural pattern of your symptoms, the more useful the consultation will be.

Keep a symptom diary for 1–2 weeks

A brief record of when symptoms occur and what makes them better or worse is one of the most useful things you can bring to a GP appointment. The postural pattern — symptoms worse on standing, better on lying down — is the key feature to capture.

Record each time you feel unwell

Note the time, what you were doing (standing, sitting, lying), and which symptoms occurred. Rate severity 0–10 if helpful.

Note what improves symptoms

Does lying down help? How quickly? This postural relief pattern is diagnostically important and worth documenting.

Record your heart rate if possible

If you have a smartphone, smartwatch, or fitness tracker, record your heart rate lying down and then 1–2 minutes after standing. A consistent jump of 30+ bpm is significant.

List all your symptoms

PoTS affects multiple systems. Note dizziness, palpitations, fatigue, brain fog, nausea, headache, breathlessness, and any others — even if they seem unrelated.

Heart rate recording tip: If you have access to any device that records continuous heart rate — a smartwatch, fitness tracker, or even a smartphone app — a recording showing your heart rate at rest then immediately after standing can be compelling evidence for a GP. A sustained rise of 30 bpm or more within 10 minutes of standing is the diagnostic threshold for PoTS.[1]

Step 2

At the GP appointment

You may not have previously mentioned the postural pattern of your symptoms explicitly — it can be easy to describe what you feel without explaining when and why. The most important thing to communicate at the appointment is the postural nature: symptoms come on or get worse when you stand up, and get better when you lie down.

What to say

You do not need to know the term PoTS or request a specific diagnosis — simply describing your symptoms and their pattern clearly is the starting point. Something like the following is a good basis for the conversation:

Suggested way to describe your symptoms Adapt to your own experience

"I have been experiencing [dizziness / palpitations / extreme fatigue / brain fog] for around [X months]. The symptoms are consistently worse when I stand up, and improve — sometimes quite quickly — when I lie down. I've also noticed that my heart rate seems to jump significantly on standing. I've read about a condition called PoTS, or postural tachycardia syndrome, and I wonder whether it might be worth assessing me for this. I understand it can be checked with a simple standing heart rate test."

What to ask for

An active stand test — lying and standing heart rate and blood pressure. This can be done in the surgery and takes around 15 minutes.
Basic blood tests to exclude other causes — full blood count, thyroid function tests, ferritin, U&Es, glucose.
An ECG, if not done recently.
If the stand test is positive or the GP is uncertain — a referral to Cardiology (arrhythmia or syncope clinic) for further assessment.

It may take more than one appointment. PoTS average diagnostic delay in the UK is 3–5 years.[2] You may need to come back, bring more documented evidence, or ask for a second opinion. This is not unusual and does not reflect any failing on your part.

GP information sheet

Our clinician resources page contains a summary of PoTS diagnostic criteria and the active stand test protocol — written for GPs. You may find it helpful to print this and bring it with you, or to refer your GP to this website.

GP and clinician resources page →

Step 3

The active stand test — what to expect

The active stand test (also called the NASA lean test when performed against a wall) is the primary diagnostic tool for PoTS in primary care. It requires no specialist equipment and can be done in a GP surgery. Understanding what it involves can help reduce any anxiety about the test itself.

1

Preparation

Before the test

You will be asked not to eat a large meal, drink caffeine, or exercise vigorously for 2 hours beforehand. Drink normally — adequate hydration is important. Tell the nurse or doctor about any medications you take.

2

Lying phase — 10 minutes

Lying flat

You will lie flat on an examination couch for at least 10 minutes while your heart rate and blood pressure are recorded. This establishes your baseline. Try to relax — you may feel slightly anxious which can affect readings, so the nurse will usually allow you to settle before taking the final baseline measurement.

3

Standing phase — up to 10 minutes

Standing

You will be asked to stand up actively. Your heart rate and blood pressure will be measured at 1, 3, 5, and 10 minutes of standing. You will also be asked to describe any symptoms you experience at each interval — dizziness, palpitations, nausea, vision changes. This symptom information is clinically as important as the numbers.

If you feel faint or very unwell at any point, tell the clinician immediately. You will be asked to sit or lie down, and the test will stop. This is a safe response, not a failure.

4

Interpretation

What the results mean

A sustained rise in heart rate of ≥30 bpm (≥40 bpm if you are aged 12–19) at any point during the 10 minutes of standing, in the presence of symptoms, is consistent with PoTS.[1] A negative test does not definitively exclude PoTS — symptoms fluctuate, and some people have a borderline result on one day. If clinical suspicion is high, the test may be repeated or formal tilt table testing requested.

The test can reproduce your symptoms. This is by design — the test is specifically trying to capture what happens to your body on standing. If you feel unwell during the test, tell the clinician: symptom reproduction at the same time as the heart rate rise is strong supporting evidence for the diagnosis.

Step 4

Investigations — what blood tests and other tests are involved

A PoTS diagnosis is made clinically, primarily through the active stand test. Blood tests do not diagnose PoTS, but they are important to exclude other conditions that can cause similar symptoms, and to identify any secondary causes or treatable contributors.

Investigation	Why it's done	Where
Full blood count (FBC)	Exclude anaemia, which can cause palpitations and fatigue on standing	GP (primary care)
Thyroid function tests (TFTs)	Exclude hyperthyroidism, which causes tachycardia	GP
U&E and eGFR	Assess renal function and electrolytes (relevant for salt loading and medications)	GP
Fasting glucose or HbA1c	Exclude diabetes, a cause of autonomic neuropathy	GP
Ferritin and iron studies	Iron deficiency worsens PoTS and should be treated; easy to miss on FBC alone	GP
ECG (12-lead)	Exclude cardiac arrhythmia, long QT, pre-excitation, or other structural causes of tachycardia	GP or cardiology
Active stand test	Primary diagnostic test for PoTS	GP or cardiology
24-hour ambulatory ECG (Holter)	If arrhythmia is suspected; assesses heart rhythm over a full day	Cardiology (referred)
Tilt table test	More controlled orthostatic challenge; used if active stand test is equivocal or further assessment is needed	Cardiology / autonomic specialist
Echocardiogram	If structural cardiac cause suspected; rarely needed in straightforward PoTS	Cardiology

Normal results are expected and important. Most blood tests in PoTS come back normal — this is not a reason to doubt the diagnosis. A normal FBC, TFTs, and ECG, combined with a positive active stand test and typical symptoms, is entirely consistent with PoTS. Normal results help exclude other conditions rather than rule in or rule out PoTS itself.

Step 5

Referral — when and where

Not everyone with PoTS needs a specialist referral. If the diagnosis is clear from the active stand test, basic bloods are normal, and symptoms are manageable with first-line measures, a GP can begin management without referral. Referral is appropriate in the following circumstances.

Diagnostic uncertainty — the stand test is borderline, or the clinical picture is atypical
Syncope (fainting) — loss of consciousness requires specialist assessment to exclude cardiac causes
Abnormal ECG — needs cardiology review before a diagnosis of PoTS is accepted
First-line management has not helped — if fluid and salt loading and compression have not improved symptoms after 4–8 weeks
Pharmacotherapy is being considered — ivabradine, fludrocortisone, and midodrine are ideally initiated under specialist supervision
Significant functional impairment — if symptoms are preventing school, work, or daily activities
Adolescents — paediatric or adolescent cardiology referral is preferred in younger patients

Where to be referred in Scotland

In Scotland, most people with PoTS are referred to Cardiology — specifically an arrhythmia clinic, syncope clinic, or general cardiology depending on the health board. There is currently no dedicated autonomic clinic in Scotland. For complex cases with significant neurological features, a Neurology referral may also be appropriate.

Waiting times vary considerably between health boards and have been prolonged in recent years. While awaiting referral, first-line management — fluid loading, salt, compression, postural strategies — can and should be started by the GP. Beginning these measures does not affect the validity of subsequent specialist assessment.

If things are difficult

If you feel you are not being taken seriously

Unfortunately, the experience of not being believed, or of symptoms being attributed to anxiety or deconditioning without proper assessment, is common in PoTS. The average diagnostic delay is 3–5 years, and many patients see multiple healthcare professionals before receiving a diagnosis.[2]

If this happens, the following approaches may help:

Ask specifically for an active stand test. This is a concrete, objective request — it takes 15 minutes, requires no equipment beyond a blood pressure cuff, and directly tests the physiological abnormality. It is difficult to decline without good reason.
Bring documented evidence. A heart rate recording showing a consistent jump on standing (from a smartwatch or fitness app) is compelling objective data that is difficult to dismiss.
Share the GP resources page from this site. It summarises the diagnostic criteria, the active stand test protocol, and provides academic references. Giving a GP a credible clinical resource can shift the conversation.
Ask for a second opinion. You are entitled to request a second opinion on the NHS. This can be from another GP in the same practice, or you can ask to be seen by a different GP.
Contact patient organisations. Dysautonomia UK and POTS UK both provide information and support for patients navigating the diagnostic process, including template letters and guidance on how to approach healthcare professionals.

You are not alone: Many people with PoTS describe a long and frustrating journey to diagnosis. This is a systemic problem related to low clinical awareness — not a reflection of the validity of your symptoms or your experience. Persistence, documentation, and using resources like this site to share information with your GP are the most effective tools available.

After diagnosis

What happens after a PoTS diagnosis

A diagnosis is the beginning of a process, not an end point. For most people, PoTS management involves a combination of lifestyle changes, physical strategies, and where needed, medication — all of which improve symptoms significantly for the majority of patients.

Start non-pharmacological measures immediately — fluid and salt loading, compression garments, and postural strategies can begin as soon as the diagnosis is made, without waiting for specialist input.
Read the managing PoTS page — comprehensive guidance on exercise, diet, medications, and day-to-day strategies is available on this site.
Consider whether related conditions need assessment — hEDS, ME/CFS, and MCAS all co-occur with PoTS at significant rates. If you have joint hypermobility, post-exertional malaise, or symptoms suggesting mast cell activation, discuss these with your GP.
Keep a record of your management — noting what helps, what doesn't, and any medication side effects is valuable both for your own awareness and for consultations.
Connect with the patient community — Dysautonomia UK and POTS UK offer peer support, information, and advocacy. Living with a chronic condition is easier with community.