Atrial fibrillation living patient overview
Informed by recognized medical guidance
Overview
Atrial fibrillation (also called AF or AFib) is a common heart rhythm problem where the upper chambers of the heart (the atria) beat irregularly and often too fast. This means the heart does not pump blood as efficiently as it should.
Key facts
- AF is not usually life-threatening on its own, but it can increase the risk of stroke if not managed.
- Many people with AF live full, active lives with proper treatment.
- AF can come and go (paroxysmal) or be persistent.
Yes, atrial fibrillation is one of the most common heart rhythm disorders. It affects millions of people worldwide.
AF can affect people of any age, but it becomes more common as you get older. It is more common in people with other heart conditions, high blood pressure, diabetes, or those who are overweight.
Symptoms
- Chest pain that lasts more than a few minutes or that goes away and comes back.
- Trouble breathing or severe shortness of breath.
- Fainting or passing out.
- Sudden weakness or numbness on one side of the body (signs of a stroke).
- ⚠New or worsening palpitations that don't go away.
- ⚠Dizziness that makes you feel like you might faint.
- ⚠Unusual fatigue that interferes with daily activities.
Common symptoms
- Heart palpitations – a feeling that your heart is racing, fluttering, or beating irregularly.
- Shortness of breath, especially during activity.
- Fatigue or feeling tired all the time.
- Dizziness or lightheadedness.
- Chest discomfort or pain.
Symptoms in children
- AF is rare in children. When it occurs, symptoms may include palpitations, fatigue, poor feeding in infants, or fainting during exercise.
Symptoms in older adults
- Older adults may experience fatigue, shortness of breath, or confusion. Sometimes they have no symptoms at all, and AF is found during a routine check-up.
Causes
Main causes
- High blood pressure (hypertension).
- Heart disease, including coronary artery disease or heart valve problems.
- Overactive thyroid (hyperthyroidism).
- Heavy alcohol use or binge drinking.
- Sleep apnea.
- Lung disease or infections.
Risk factors
- Age – risk increases over 60.
- Obesity.
- Diabetes.
- Family history of AF.
- Long-term endurance exercise (like marathon running) in some people.
- Smoking.
When to see a doctor
See a doctor urgently if:
- You have new palpitations that are fast and don't slow down.
- You feel chest pain or pressure, especially with activity.
- You feel dizzy or faint.
Book a routine appointment if:
- You have persistent fatigue or irregular pulse that worries you.
- You have risk factors like high blood pressure or diabetes and want a check-up.
- You are planning to start a new exercise program and have heart concerns.
Diagnosis
Your doctor will take your medical history, listen to your heart, and likely order an electrocardiogram (ECG or EKG) to check your heart's electrical activity.
Tests that may be done
- Electrocardiogram (ECG) – records the heart's rhythm.
- Holter monitor – a portable ECG you wear for 24–48 hours to catch irregular rhythms.
- Event monitor – a device you use for weeks to record symptoms when they happen.
- Echocardiogram – an ultrasound of your heart to look at structure and function.
- Blood tests – to check thyroid function or other causes.
What to expect at your appointment
Diagnosing AF often requires more than one test because the rhythm may come and go. You may need to wear a monitor for a while. Your doctor will explain each step and what the results mean.
Treatment
Treatment for AF focuses on controlling the heart rate and rhythm, preventing blood clots (which can cause stroke), and managing any underlying causes.
Self-care at home
- Limit or avoid alcohol, especially heavy drinking.
- Stop smoking.
- Manage stress with relaxation techniques like deep breathing or meditation.
- Get enough sleep and treat sleep apnea if present.
- Stay active with your doctor's approval.
Medical treatments
Medicines are often used to slow the heart rate (rate control) or restore normal rhythm (rhythm control). Blood thinners (anticoagulants) may be prescribed to reduce stroke risk. Your doctor will choose the best plan for you. Never stop or change your medications without talking to your doctor.
When is surgery considered?
Some people may need a procedure called cardioversion (an electrical shock to reset the heart rhythm) or catheter ablation (a procedure to destroy tiny areas of heart tissue causing the irregular signals). A pacemaker may sometimes be needed. Your doctor will discuss whether these are options for you.
Living with this condition
Living with AF means getting to know your symptoms and triggers. Keep a diary of when your heart feels irregular, what you were doing, and how you felt. Share this with your doctor.
Lifestyle tips
- Check your pulse regularly and note any changes.
- Take your medications exactly as prescribed.
- Stay active but listen to your body – rest when you need to.
- Avoid large meals and stimulants like caffeine if they trigger symptoms.
Diet and exercise
Eat a heart-healthy diet – plenty of fruits, vegetables, whole grains, and lean proteins. Limit salt, sugar, and saturated fats. Regular exercise like brisk walking is good, but check with your doctor before starting anything vigorous.
Mental health and emotional wellbeing
Having a chronic condition like AF can cause anxiety or worry about symptoms and stroke risk. It is normal to feel stressed. Talk to your doctor or a counsellor if you are struggling. Stress management techniques can help.
Prevention
You cannot always prevent AF, especially if you have a family history or are older. But you can lower your risk by managing high blood pressure, keeping a healthy weight, limiting alcohol, not smoking, and treating conditions like sleep apnea.
Screening programmes
If you have risk factors, your doctor may check your pulse during routine visits. In some settings, screening with an ECG is offered for older adults. There is no standard screening for everyone, but talk to your doctor if you are concerned.
Complications
If left untreated
- Stroke – because AF can cause blood clots to form in the heart and travel to the brain.
- Heart failure – when the heart cannot pump enough blood due to inefficient rhythm.
- Other heart rhythm problems or worsening symptoms.
Long-term outlook
With proper treatment and lifestyle changes, most people with AF can manage their condition well and maintain a good quality of life. The key is to work closely with your healthcare team, take medications as prescribed, and stay on top of regular check-ups. AF does not have to stop you from doing the things you love.
Find support
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
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Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 30, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.