Dizziness and blackout assessment

What is a dizziness and blackout assessment?

Dizziness and blackouts are common in older people and have many possible causes. The medical word for a blackout caused by a brief drop in blood supply to the brain is syncope (a faint). Other causes include a drop in blood pressure on standing, heart rhythm or heart valve problems, inner-ear and balance disorders, medicines, dehydration, and sometimes seizures.

This assessment is a structured work-up to tell these apart. A specialist (often a geriatrician or cardiologist) takes a careful history of exactly what happened, examines you, checks your blood pressure lying and standing, records your heart with an ECG, and arranges further tests where needed.

The goal is to find treatable causes, especially heart causes that can be dangerous, and to reduce the chance of injury from a fall. In older people, blackouts and unexplained falls overlap, so an assessment may look at both together.

It is worth being clear about what the assessment can and cannot do. It can often find a cause and guide treatment. Sometimes, even after thorough testing, no clear cause is found, and the focus shifts to safety, monitoring and avoiding triggers.

Types, options & approaches

There may be different ways to do this. The right approach depends on the clinical question and your circumstances.

Options at a glance

These are the main approaches described in this guide. The right option depends on the diagnosis, your goals and what your clinician thinks is safe.

Preparing for your test

• Write down exactly what happened: what you were doing, any warning signs, how long it lasted, and how you felt afterwards.
• Ask anyone who saw the episode to describe it, or to come with you — a witness account is often the most useful information.
• Bring a full list of your medicines, including blood-pressure tablets, water tablets and anything that can cause drowsiness.
• Note any pattern: standing up, after meals, on exertion, when turning your head, or with palpitations.
• Bring home blood-pressure readings if you measure them.
• Bring your glasses and hearing aids, and wear clothing that allows blood-pressure and ECG checks.
• Do not drive to the appointment if you have recently blacked out; ask the team about driving rules.

What happens

The specialist asks in detail about the episode and any pattern, your medicines and your other health problems, then examines your heart, blood pressure and nervous system.

A 12-lead ECG is usually done during the first assessment. Your blood pressure is checked lying and standing. Depending on what is found, you may be offered longer heart-rhythm monitoring at home, an ultrasound of the heart, blood tests, or a tilt-table test.

If the picture suggests a heart rhythm problem, prompt cardiology investigation is arranged, because these causes can be dangerous. If it suggests a blood-pressure or medicine cause, the specialist reviews and adjusts treatment. If balance or the inner ear is involved, balance tests and rehabilitation may be arranged.

Before you leave, you should understand the most likely cause, what tests are still pending, what to avoid, and what to do if you black out again, including driving advice.

Is this test right for me?

A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.

Before you decide

Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.

The main danger with blackouts is missing a heart cause or being injured by a fall before the cause is found. Features that raise concern include blacking out during exertion, palpitations or chest pain beforehand, no warning at all, a family history of sudden death, or an abnormal ECG. Tell the specialist about these clearly, and treat any blackout with injury, chest pain or breathlessness as an emergency.

Published figures to discuss

The causes of dizziness and blackouts vary a great deal with age and health, and figures from studies depend heavily on the population and setting. In older people, a drop in blood pressure on standing and heart causes are common, but the mix differs from person to person. Because single percentages can mislead and a heart cause must never be missed, exact rates are not quoted here; your specialist can explain the likely causes for your situation.

These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.

What happens afterwards

There is no physical recovery from the assessment. Afterwards, what matters is following the plan, completing any home heart monitoring, adjusting medicines safely, and knowing the driving rules and red flags.

• Continuing to feel cautious or anxious about another episode.
• Waiting days to weeks for heart-monitor results.
• Adjusting to changes in blood-pressure or other medicines.
• Living with a temporary driving restriction while the cause is worked out.

Aftercare

• Complete any home heart-rhythm monitoring and keep a symptom diary.
• Take medicines as advised, and report dizziness when standing or after dose changes.
• Stand up slowly, stay well hydrated, and avoid known triggers such as hot rooms or long standing.
• Follow the driving rules you are given and, if you need to tell the licensing authority, contact the DVLA if you live in England, Scotland or Wales, or the DVA if you live in Northern Ireland.
• Reduce fall risk at home: good lighting, clear floors, and safe footwear.
• Keep all follow-up appointments and chase pending results.
• Know your red flags and have a clear plan for who to call if you black out again.

• Detailed account of the episode written down
• A witness description if available
• Full medicine list, including blood-pressure and water tablets
• Home blood-pressure readings if you have them
• Note of any pattern (standing, after meals, on exertion)
• Glasses and hearing aids
• Saved contact details and a plan for what to do if it happens again

⚠ Get urgent help if…

• Blacking out with chest pain, severe breathlessness or palpitations — call 999.
• Blacking out during exercise or exertion.
• A blackout with no warning at all, or one causing serious injury.
• Repeated blackouts or blackouts that are getting more frequent.
• Weakness, slurred speech or facial droop with the episode — treat as a possible stroke and call 999.
• A new, very slow or very fast pulse with dizziness.
• Fainting and a family history of sudden, unexplained death.

Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.

General guidance — it doesn't replace the specific advice your specialist gives you.

Results & realistic expectations

A good assessment ends with the most likely cause and a plan to treat it or to keep you safe. Many causes, such as a drop in blood pressure on standing or a medicine side effect, respond well to simple changes.

A normal ECG and normal first tests are reassuring but do not always explain an episode, because some rhythm problems are intermittent. If the cause is not found at first, longer monitoring or a tilt-table test may help, and the plan focuses on safety in the meantime. No assessment can promise you will never faint again.

The value of the assessment depends on the cause. Some causes are fixed with a one-off change, such as adjusting a medicine. Others, such as a fainting tendency or heart rhythm problems, need ongoing management and review. As you age and your medicines change, dizziness can return, so plans may need revisiting.

Related tests, treatments or support

In older people this assessment often overlaps with a falls assessment and a medicines review, because dizziness, blackouts and falls share many causes. It may be combined with heart-rhythm monitoring, an ultrasound of the heart, bone-health review if you have fallen, and balance rehabilitation.

Follow-up & long-term care

You should be told who is coordinating your care and when pending results, especially heart monitoring, will come back. Follow-up usually reviews the monitoring results, any medicine changes, and whether symptoms have settled. Make sure you leave with a named contact, driving advice and a clear safety plan.

• Periodic review of blood-pressure and other medicines that can cause dizziness.
• Ongoing management of any heart rhythm problem, including device checks if a pacemaker is fitted.
• Hydration and standing-up strategies for blood-pressure-related dizziness.
• Continued falls-prevention measures at home.
• Balance rehabilitation exercises if an inner-ear or balance cause is found.

Repeat, follow-on and what comes next

• A normal ECG or first set of tests does not rule out an intermittent heart rhythm problem, so repeat or longer monitoring is common.
• The likely cause is often revised once monitoring or a tilt-table test is complete.
• Some people need an escalation in treatment, such as a pacemaker, after the initial assessment.
• If no cause is found, reassessment is appropriate if symptoms change or recur.

Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.

What good aftercare looks like

• A clear most-likely cause, a written plan, and a named contact for questions.
• Completion and timely reporting of any home heart monitoring.
• A medicines review with a plan to recheck standing blood pressure after changes.
• Explicit driving advice and red-flag instructions, including when to call 999.
• Falls-prevention measures and onward referral (cardiology, balance rehab) where needed.

What affects the cost

Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:

• The specialist's assessment time and complexity of the history.
• Heart-rhythm monitoring, especially longer home monitoring.
• Heart imaging (echocardiogram) and blood tests.
• Specialist tests such as a tilt-table test where needed.
• Whether same-day reporting is arranged.
• Follow-up appointments and any cardiology procedures such as a pacemaker.

• The specialist's assessment fee.
• Each test fee (ECG, monitoring, echocardiogram, blood tests) and who reports them.
• Tilt-table or other specialist tests if needed.
• Follow-up appointments and how results are communicated.
• Cancellation policy and what happens if results are inconclusive.
• What happens, and what it costs, if an urgent transfer or cardiology procedure is needed.

On the NHS? Assessment of blackouts and dizziness is available on the NHS when clinically indicated, including rapid investigation when a heart cause is suspected; private routes are mainly used for speed or choice with non-urgent symptoms.

You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.

Consent traps and marketing red flags

These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.

Choosing a specialist safely

• Check the specialist is on the GMC Specialist Register for this area.
• Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
• You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
• Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
• You're entitled to your total cost in writing — including any follow-up — before you decide.

How Vuemedics verifies every consultant →

Take this to your consultation. A good specialist will welcome every one of these.

• What do you think caused my dizziness or blackout, and is a heart cause likely?
• Do I need heart-rhythm monitoring, an ultrasound of the heart, or a tilt-table test?
• Could any of my medicines be making this worse?
• What can I do to avoid another episode and to reduce my risk of falling?
• What are the driving rules, and do I need to tell the DVLA (or the DVA if I live in Northern Ireland)?
• What should I do, and who should I call, if I black out again?
• Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
• Will you be the specialist who carries out my test, and who looks after me afterwards?
• What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
• What does a realistic result look like — and what can this test not achieve?
• What are my options, including waiting, doing nothing for now, or choosing a different approach?
• Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
• What is the total cost in writing, including any follow-ups, and how much time do I have to decide?

Find a verified specialist for dizziness and blackout assessment

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How we made this page

Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →

Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.

Sources & standards: NICE CG109 — Transient loss of consciousness ('blackouts') in over 16s NICE QS71 — Initial assessment with 12-lead ECG NICE CG109 — Information for the public: initial assessment NHS Right Decisions — Syncope in older people British Geriatrics Society — CGA: falls history DVLA — Assessing fitness to drive DVA Northern Ireland — Telling DVA about a medical condition

Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.

Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.