Atrial Fibrillation
Atrial fibrillation causes a fast and erratic heart beat.
It is a complication of various diseases. Medication can slow the heart rate back to normal, and ease symptoms. In some cases, treatment can restore the heart back to a normal rhythm. In addition, drugs such as warfarin or aspirin are usually advised to reduce the risk of having a stroke.
- What Is Atrial Fibrillation?
- How the Heart Works
- Types, and who is at risk
- What Are the Signs and Symptoms of Atrial Fibrillation?
- How Is Atrial Fibrillation Treated?
- How Can Atrial Fibrillation Be Prevented?
- Key points Atrial Fibrillation
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What Are the Signs and Symptoms of Atrial Fibrillation?
Signs and Symptoms
Atrial fibrillation (AF) usually causes the ventricles to contract faster than normal.
When this happens, the ventricles don’t have enough time to fill completely with blood to pump to the lungs and body. This inefficient pumping can cause signs and symptoms, such as:
- • Palpitations (a strong feeling of a fast heartbeat or a “thumping” in the chest)
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• Shortness of breath
- • Weakness or difficulty exercising
- • Chest pain ( angina )
- • Dizziness or fainting
- • Fatigue (tiredness)
- • Confusion
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Complications
AF has two major complications stroke and heart failure. Heart attack is another, rarer complication.
Stroke
During AF, the atria don’t pump all of their blood to the ventricles. Some blood pools in the atria. When this happens, a blood clot - also called a thrombus - can form. If the clot breaks off and travels to the brain, it can cause a stroke. A clot that forms in one part of the body and travels in the bloodstream to another part of the body is called an embolus.
Blood-thinning medicines to reduce the risk of stroke are a very important part of treatment for patients who have AF.
Atrial Fibrillation and Stroke
The illustration shows how a stroke can occur during atrial fibrillation. If a clot (thrombus) forms in the left atrium of the heart, a piece of it can dislodge and travel to an artery in the brain, blocking blood flow through the artery. The lack of blood flow to the portion of the brain fed by the artery causes a stroke.
Heart Failure
Heart failure occurs when the heart can’t pump enough blood to meet the body’s needs. Because the ventricles are beating very fast and aren’t able to properly fill with blood to pump out to the body, AF can lead to heart failure.
Fatigue and shortness of breath are common symptoms of heart failure. A buildup of fluid in the lungs causes these symptoms. Fluid also can build up in the feet, ankles, and legs, causing weight gain.
Lifestyle changes, medicines, and sometimes special care (rarely, a mechanical heart pump or heart transplant) are the main treatments for heart failure.