Atrial fibrillation living in teenagers
Informed by recognized medical guidance
Overview
Atrial fibrillation (say: AY-tree-ul fih-brih-LAY-shun) is a heart condition where the upper chambers of your heart beat in a fast, irregular way instead of a steady rhythm. This can make your heart feel like it's fluttering or skipping beats.
Key facts
- Atrial fibrillation is rare in teenagers but can happen.
- It often has a treatable cause, like a heart problem present at birth or a thyroid issue.
- With proper care, most teens with atrial fibrillation can lead active, normal lives.
Atrial fibrillation is not common in teenagers. It is much more frequent in older adults, especially those over 65.
Teenagers who have certain heart conditions (like congenital heart disease), high blood pressure, lung problems, or overactive thyroid may be at higher risk. Sometimes it happens for no clear reason.
Symptoms
- Chest pain or pressure that does not go away
- Sudden severe shortness of breath
- Fainting or passing out (syncope)
- Sudden weakness or numbness on one side of the body (could be a stroke)
- ⚠Palpitations that last more than a few minutes and make you very dizzy
- ⚠Feeling like you are going to faint (but don't)
- ⚠Racing heart that does not slow down when you rest
Common symptoms
- Heart palpitations — feeling like your heart is pounding, fluttering, or racing
- Shortness of breath, especially during exercise
- Feeling tired or weak
- Dizziness or lightheadedness
Symptoms in children
- Some teens may have no symptoms at all and only find out during a check-up
- Others may feel a sudden pounding in the chest
- Trouble keeping up with sports or physical activities
Symptoms in older adults
- This section is for teenagers, so we focus on teen experiences. In adults, symptoms are similar but may be less noticeable and more linked to other health problems.
Causes
Main causes
- Heart problems you are born with (congenital heart disease)
- Overactive thyroid (hyperthyroidism)
- Heart muscle problems (cardiomyopathy)
- Inflammation of the heart (myocarditis) from a virus
Risk factors
- Having had heart surgery as a child
- High blood pressure
- Lung diseases like asthma or cystic fibrosis
- Very high levels of stress or intense exercise (in some rare cases)
- Using stimulant drugs or energy drinks in large amounts
When to see a doctor
See a doctor urgently if:
- Heart racing or fluttering that does not stop after a few minutes
- Dizziness or fainting with palpitations
- Chest pain or trouble breathing with palpitations
Book a routine appointment if:
- Any time you notice your heart beating oddly, even if it only lasts a short while
- If you feel more tired than usual during sports or everyday activities
Diagnosis
Doctors diagnose atrial fibrillation by checking your heart rhythm with a simple, painless test called an electrocardiogram (ECG or EKG). They might also ask about your symptoms and do a physical exam.
Tests that may be done
- Electrocardiogram (ECG) — stickers on your chest to record your heart's electrical activity
- Holter monitor — a portable ECG you wear for 24 to 48 hours to catch irregular rhythms
- Event monitor — a device you press when you feel symptoms
- Echocardiogram (echo) — an ultrasound of your heart to see its structure and function
- Blood tests — to check thyroid, kidney, and electrolyte levels
What to expect at your appointment
The doctor will ask about your symptoms, activities, and family history. The tests are painless and usually done in a clinic or hospital. You may need to wear a monitor for a day or two to capture the irregular rhythm.
Treatment
Treatment for atrial fibrillation in teenagers focuses on controlling the heart rhythm, preventing blood clots, and treating any underlying cause. The approach depends on your symptoms and health. Your care team will work with you and your family to find the safest plan.
Self-care at home
- Avoid caffeine, energy drinks, and stimulant drugs that can trigger palpitations
- Get enough sleep — aim for 8–10 hours per night
- Manage stress with deep breathing, mindfulness, or talking to someone you trust
- Stay active, but stop and rest if you feel dizzy or breathless
Medical treatments
Doctors may prescribe medicines to slow down a fast heart rate or help keep the heart in a normal rhythm. They might also recommend blood thinners (anticoagulants) to lower the risk of stroke, but this is less common in teens unless there is another risk factor. Always take medicine exactly as prescribed. Do not change doses or stop without talking to your doctor.
When is surgery considered?
In some cases, a procedure called catheter ablation may be considered. A thin tube is guided to the heart to destroy the tiny area causing the irregular signals. This is usually only done if medicines do not work or cause side effects.
Living with this condition
Most teens with atrial fibrillation can go to school, hang out with friends, and play sports. You may need to take medicine daily and have regular check-ups. It helps to keep a diary of when symptoms happen and what you were doing.
Lifestyle tips
- Tell your coach or teacher about your condition in case of an emergency
- Wear a medical alert bracelet or ID if your doctor recommends it
- Avoid smoking, vaping, and alcohol
Diet and exercise
Eat a balanced diet with fruits, vegetables, and whole grains. Stay hydrated, but watch caffeine. Exercise is encouraged — try walking, swimming, or biking. Avoid extreme sports like skydiving or scuba diving without your doctor's okay. If you feel any symptoms during exercise, stop and rest.
Mental health and emotional wellbeing
Having a heart condition can feel scary or frustrating. You might worry about your heart or feel different from your friends. It is normal to have these feelings. Talk to a parent, school counselor, or doctor. They can help you cope.
Prevention
Atrial fibrillation cannot always be prevented, especially if it is caused by a condition you were born with. But you can reduce triggers by staying healthy — eating well, exercising, managing stress, and avoiding stimulants.
Vaccines
Getting recommended vaccines, like the flu shot, may help prevent infections that can affect the heart (such as myocarditis).
Screening programmes
If you have a family history of heart rhythm problems or a known heart condition, your doctor may want to check your heart rhythm at regular check-ups.
Complications
If left untreated
- Blood clots can form in the heart and travel to the brain, causing a stroke
- The heart may become weaker over time, leading to heart failure
- Frequent rapid heartbeats can cause damage to the heart muscle
Long-term outlook
With the right treatment and lifestyle, most teenagers with atrial fibrillation do very well. Many live full, active lives. The condition may go away once the underlying cause (like a thyroid problem) is treated. Your doctor will help you manage it so you can focus on being a teen.
Find support
International organisations
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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.