---
title: "Atrial fibrillation: Symptoms & Treatment | HealthAnswers"
description: "Atrial fibrillation (AF) — irregular heartbeat, palpitations, stroke risk, anticoagulation, and NHS rate control treatments."
url: https://healthanswers.co.uk/conditions/atrial-fibrillation/
robots: noindex
---

# Atrial fibrillation: Symptoms & Treatment | HealthAnswers

Health A–Z

Atrial fibrillation (AF) — irregular heartbeat, palpitations, stroke risk, anticoagulation, and NHS rate control treatments.

Written by HealthAnswers editorial team Medically reviewed by [HealthAnswers UK doctor review panel](https://healthanswers.co.uk/our-doctors/) Reviewed 3 July 2026

## Quick answer

What is atrial fibrillation? Atrial fibrillation is the most common heart rhythm disorder — irregular often fast heartbeat from chaotic electrical activity in the upper heart chambers. Symptoms include palpitations, breathlessness, fatigue, and dizziness — but some people have no symptoms. Main treatment goals — control rate or rhythm and prevent stroke with anticoagulants if stroke risk warrants. See a GP for persistent palpitations or irregular pulse — pulse check can detect AF.

## Who is this page for?

This page is for people in the UK who want a plain-English overview of Atrial fibrillation, including when to seek help and what NHS care usually involves. It explains general information, not what is wrong with you personally.

## Who should skip this page?

Skip this page if you need a diagnosis, a prescription, or emergency care. It cannot replace a GP, pharmacist, NHS 111 or 999. If you are in immediate danger, call 999; for urgent advice that is not life-threatening, call 111 in England, Scotland or Wales, or use your GP out-of-hours service in Northern Ireland.

On this page 9 sections

## Key facts about atrial fibrillation

- AF affects about 1 in 10 people over 65 — incidence rising with ageing population.
- Irregularly irregular pulse — no pattern between beats — classic examination finding.
- AF increases stroke risk about 5-fold — CHA2DS2-VASc score guides anticoagulation need.
- DOAC anticoagulants (apixaban, edoxaban, rivaroxaban) preferred over warfarin for most non-valvular AF.
- Alcohol binge, hypertension, sleep apnoea, and hyperthyroidism are common modifiable triggers.

## Atrial fibrillation (AF) — irregular heartbeat

**Atrial fibrillation** is **chaotic electrical activity** in the **atria** (upper heart chambers) — ** ineffective atrial contraction** — ** irregular ventricular response** — often **fast**.

**Most common sustained arrhythmia** — **UK ~1.4 million** — **1 in 10** over 65.

**Stroke prevention** is **central** — AF causes **~20%** of UK strokes.

## Symptoms

- palpitations — irregular irregular

- fatigue

- breathlessness

- dizziness , presyncope

- chest discomfort

- polyuria — ANP release

**Asymptomatic AF** — **opportunistic pulse check** in **≥65** — NHS recommendation.

## Types

| Type | Pattern |
| --- | --- |
| Paroxysmal | Episodes <7 days, self-terminating |
| Persistent | >7 days — needs cardioversion/drugs |
| Permanent | Accepted — rate control |

## Diagnosis

**12-lead ECG** — **no P waves**, ** irregularly irregular RR**, ** fibrillatory baseline**

**Ambulatory monitor** if paroxysmal — **symptom loop recorder**

**Blood tests** — **TFTs**, **FBC**, **U&E**, **LFTs** — exclude triggers

**Echocardiogram** — **structure**, **valve disease**, **LA size**

## Stroke risk — CHA2DS2-VASc

Score components:

- C — CHF

- H — Hypertension

- A2 — Age ≥75 (2 points)

- D — Diabetes

- S2 — prior Stroke/TIA (2 points)

- V — Vascular disease

- A — Age 65–74

- Sc — Sex category female

**Men ≥2, Women ≥3** — **offer anticoagulation** (NICE)

**HAS-BLED** — bleeding risk — **not reason alone to withhold** if high stroke risk — **manage modifiable bleeds**.

## Anticoagulation

**DOACs first-line non-valvular AF:**

- apixaban

- rivaroxaban

- edoxaban

- dabigatran

**Warfarin** — **mechanical valve**, **moderate-severe mitral stenosis**

**Aspirin alone** — **not adequate** stroke prevention in AF.

See [stroke](https://healthanswers.co.uk/conditions/stroke/) prevention context.

## Rate vs rhythm control

**Rate control** — **first-line many** especially **>80 years**:

- bisoprolol

- diltiazem (avoid if reduced EF)

- digoxin — sedentary elderly

**Rhythm control:**

- electrical cardioversion — sedated shock — anticoagulate ≥3 weeks before or TOE-guided

- flecainide , amiodarone

- catheter ablation — symptomatic paroxysmal — pulmonary vein isolation

## Triggers and comorbidity

- hypertension — treat

- alcohol — ” holiday heart”

- hyperthyroidism — see [overactive thyroid](https://healthanswers.co.uk/conditions/overactive-thyroid/)

- sleep apnoea — [sleep apnoea](https://healthanswers.co.uk/conditions/sleep-apnoea/) treatment reduces AF burden

- obesity , diabetes

- post-surgery , sepsis — reactive AF may revert

## Living with AF

- learn pulse check

- MedicAlert if on anticoagulant

- limit alcohol

- exercise as tolerated

- AF Association — support

**New palpitations** — **GP ECG same week** — **AF diagnosed is stroke risk managed**, not just ” irregular heartbeat tolerated”.

## ! When to see a GP about atrial fibrillation

See a GP if you notice persistent fluttering heartbeat, irregular pulse, unexplained breathlessness, or fatigue — 12-lead ECG confirms AF. Go to A&E if chest pain, severe breathlessness, syncope, or stroke symptoms (FAST) — phone 999. AF discovered incidentally still needs stroke risk assessment and treatment plan.

## Common questions about atrial fibrillation

What does atrial fibrillation feel like? Palpitations — fluttering or pounding heartbeat, irregular pulse, tiredness, breathlessness on exertion, dizziness, reduced exercise tolerance. Paroxysmal AF comes and goes; persistent AF continuous until treated. Some people — especially elderly — have no symptoms — found on routine pulse check. Is atrial fibrillation dangerous? Not immediately fatal itself but increases stroke risk significantly — blood pools in atria forming clots. Also heart failure risk if uncontrolled fast rate long term. Anticoagulation reduces stroke by about two-thirds in eligible patients. How is atrial fibrillation treated? Rate control — beta-blockers (bisoprolol), rate-limiting calcium channel blockers (diltiazem), digoxin selected cases. Rhythm control — cardioversion, flecainide, amiodarone, catheter ablation in selected patients. Anticoagulation — DOAC if CHA2DS2-VASc score indicates — balances stroke vs bleeding risk. What is the difference between warfarin and DOACs for AF? DOACs (direct oral anticoagulants) — apixaban, rivaroxaban, edoxaban, dabigatran — fixed doses, no routine INR monitoring, fewer food interactions — preferred for non-valvular AF. Warfarin still used if mechanical heart valve or moderate-severe mitral stenosis. Can atrial fibrillation be cured? Paroxysmal AF may respond to rhythm control or ablation — pulmonary vein isolation — cure possible in selected younger patients without structural heart disease. Persistent AF often managed long term — rate control plus anticoagulation. Treat triggers — alcohol, thyroid, sleep apnoea.

## Sources

- [NHS — Atrial fibrillation](https://www.nhs.uk/conditions/atrial-fibrillation/)
- [NICE — Atrial fibrillation management](https://www.nice.org.uk/guidance/ng196)