Atrial fibrillation living in pregnancy
Informed by recognized medical guidance
Overview
Atrial fibrillation (AF) is a heart condition where the upper chambers of the heart beat irregularly and often too fast. During pregnancy, the body goes through many changes that can affect the heart. This article explains what AF means for pregnant women and how to manage it safely.
Key facts
- AF is the most common type of heart rhythm problem.
- Pregnancy can increase the risk of AF or make it worse.
- With proper care, most women with AF have healthy pregnancies.
AF is not very common in pregnant women, but it is one of the more common heart rhythm problems during pregnancy, especially in women who already have heart conditions.
AF during pregnancy can affect women who had AF before pregnancy, or women who develop it for the first time during pregnancy. It is more likely in women with high blood pressure, heart valve problems, or other heart conditions.
Symptoms
- Chest pain that does not go away
- Severe shortness of breath or difficulty breathing
- Fainting or passing out
- Sudden weakness or numbness on one side of the body (signs of stroke)
- ⚠Rapid or irregular heartbeat that lasts more than a few minutes
- ⚠Feeling very dizzy or lightheaded
- ⚠Swelling in your legs or ankles (could be a sign of blood clot)
Common symptoms
- Palpitations (feeling like your heart is racing, fluttering, or skipping beats)
- Shortness of breath
- Feeling tired or weak
- Dizziness or lightheadedness
- Chest discomfort or pressure
Symptoms in children
- AF in children is very rare and symptoms may include poor feeding, rapid breathing, and fatigue. This article focuses on pregnancy.
Symptoms in older adults
- In older adults, AF is more common and symptoms can be similar, including palpitations, breathlessness, and dizziness. However, pregnancy-specific concerns differ.
Causes
Main causes
- Pregnancy itself can cause changes in hormones, blood volume, and heart rate that may trigger AF.
- Pre-existing heart conditions such as valve disease, high blood pressure, or previous AF.
- Other medical conditions like thyroid problems, lung disease, or infections.
Risk factors
- Having AF before pregnancy
- High blood pressure or preeclampsia
- Obesity
- Diabetes
- Smoking or drinking alcohol
- Family history of heart rhythm problems
When to see a doctor
See a doctor urgently if:
- If you have new or worsening palpitations, chest pain, or shortness of breath.
- If you have any symptoms of stroke such as face drooping, arm weakness, or speech difficulty.
Book a routine appointment if:
- If you have known AF and are pregnant or planning pregnancy, see your doctor for a preconception or prenatal check-up.
- If you have been diagnosed with AF during pregnancy and your symptoms are well-controlled, follow up as recommended.
Diagnosis
Your doctor will ask about your symptoms and medical history, listen to your heart, and may order tests to confirm AF and check your baby's health.
Tests that may be done
- Electrocardiogram (ECG): a simple test that records your heart's rhythm.
- Holter monitor: a portable device you wear for 24-48 hours to capture your heart rhythm over time.
- Echocardiogram (echo): an ultrasound of your heart to check its structure and function.
- Blood tests: to check for thyroid problems, electrolyte imbalances, or other conditions.
What to expect at your appointment
The tests are safe during pregnancy. Your doctor will also monitor your baby with regular ultrasounds and fetal heart rate checks. You may be referred to a specialist called a cardiologist and an obstetrician who work together.
Treatment
Treatment for AF during pregnancy aims to control your heart rate or rhythm, prevent blood clots, and keep both you and your baby safe. Your doctor will choose the safest options for pregnancy.
Self-care at home
- Learn to check your pulse and recognize when your heart rhythm changes.
- Keep a diary of symptoms to share with your doctor.
- Get enough rest and avoid triggers like caffeine, stress, or dehydration.
Medical treatments
Medications may be used to control heart rate or rhythm, or to thin the blood to prevent clots. Some medications are safer than others during pregnancy. Your doctor will discuss the risks and benefits. In some cases, a procedure called electrical cardioversion (a controlled electric shock to restore normal rhythm) may be considered if medications are not effective or if you are very unwell. This can be done safely during pregnancy if needed.
When is surgery considered?
Surgery such as catheter ablation (a procedure to destroy the abnormal heart tissue causing AF) is rarely needed during pregnancy and is usually postponed until after delivery unless there is a serious emergency.
Living with this condition
Living with AF during pregnancy means paying extra attention to your heart health while preparing for your baby. Work closely with your healthcare team. You can still have a normal pregnancy, but you may need more frequent check-ups.
Lifestyle tips
- Avoid smoking, alcohol, and recreational drugs.
- Limit caffeine and stimulants.
- Manage stress through relaxation techniques like deep breathing or gentle yoga (with your doctor's approval).
- Stay active with safe exercises like walking or swimming, but avoid vigorous activities that might trigger symptoms.
Diet and exercise
Eat a balanced diet rich in fruits, vegetables, whole grains, and lean protein. Stay hydrated. Avoid large meals or foods that cause heartburn, as these can sometimes trigger AF. Gentle exercise is encouraged, but check with your doctor first.
Mental health and emotional wellbeing
Anxiety and worry about your heart and your baby's health are common. It is important to talk about your feelings with your partner, family, or a counsellor. If you feel overwhelmed, seek support. You are not alone.
Prevention
Not all AF can be prevented, especially if you have a predisposition. However, you can reduce your risk by managing high blood pressure, staying at a healthy weight, and avoiding triggers like smoking and excessive alcohol.
Vaccines
Get recommended vaccines before pregnancy, such as the flu shot, to prevent infections that could stress your heart.
Screening programmes
If you have risk factors, your doctor may recommend a heart check-up before you become pregnant.
Complications
If left untreated
- Blood clots that can cause stroke
- Heart failure (heart not pumping as well as it should)
- Increased risk of preterm birth or low birth weight
- Need for early delivery or C-section
Long-term outlook
With careful monitoring and appropriate treatment, the outlook for most women with AF during pregnancy is good. Many women deliver healthy babies and return to their normal rhythm after delivery. It is important to continue follow-up after birth to ensure your heart stays healthy.
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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.