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Vorhofflimmernan irregular rhythm worth taking seriously.

Atrial fibrillation (AF) is an irregular, often fast heartbeat that starts in the upper chambers of the heart. It is common, especially with age. It matters mainly because it raises the risk of stroke, and that risk can be greatly reduced.

At a glance

Often noticed as
Palpitations, breathlessness, or nothing at all
Confirmed with
An ECG or a Holter recording
Aim of care
Prevent stroke and control the heart rate
Followed up in
Allgemeine Kardiologie

Symptoms

Symptoms vary from person to person, and some people have none. These are the most common.

  1. A fluttering, racing or irregular heartbeat
  2. Breathlessness, especially on exertion
  3. Tiredness and less energy for exercise
  4. Dizziness or light-headedness
  5. No symptoms at all: AF is often found by chance

Causes and risk factors

  • Age over 65
  • High blood pressure
  • Heart failure, valve disease or coronary artery disease
  • An overactive thyroid
  • Excess weight and sleep apnoea
  • Heavy alcohol use

How it is diagnosed

The diagnosis starts with your history and an examination. These are the tests most often used to confirm it.

How it is managed

  1. Stroke prevention

    Your stroke risk is scored, and most people with AF are offered an anticoagulant (a blood thinner) to lower it.

  2. Rate control

    Medicines slow the heart so it pumps more efficiently, which often eases symptoms.

  3. Rhythm control

    Some people benefit from restoring a normal rhythm with medicine, cardioversion or ablation, arranged by referral.

  4. Treating what drives it

    Blood pressure, weight, alcohol, sleep apnoea and thyroid problems all affect how often AF comes back.

General information, not a treatment plan. Your treatment is decided with you after an assessment.

Get emergency help now if you have

Call emergency services or go to the nearest emergency department. Do not wait for a clinic appointment.

  • Weakness of the face, arm or leg, or difficulty speaking
  • Chest pain with a racing heartbeat
  • Fainting, or nearly fainting
  • Severe breathlessness

Common questions

Is atrial fibrillation dangerous?

It is rarely an immediate danger, but untreated it raises the risk of stroke and can weaken the heart over time. Both risks can be reduced with treatment.

Will I need a blood thinner for life?

It depends on your stroke risk score, which is based on your age and other conditions. The decision is reviewed as your circumstances change.

My smartwatch says I have AF. What should I do?

Keep the recording and book an appointment. A watch reading is a useful clue, and it is confirmed with a proper ECG.

Other conditions

All conditions

Living with this, or worried you might be?

Book a consultation or send a question on WhatsApp. Your history, results and treatment are reviewed in person, and the plan is explained to you before you leave.

This page explains a condition in general terms. It cannot diagnose you or replace an examination, and it is not a treatment plan. Do not change or stop a medicine without talking to your doctor. If your symptoms are severe, sudden or happening now, seek emergency care immediately.

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