What is afib
Last updated: April 1, 2026
Key Facts
- AFib is the most common type of cardiac arrhythmia, affecting approximately 2-3% of the population
- The condition can cause blood clots in the heart, increasing stroke risk by up to five times
- Common symptoms include heart palpitations, shortness of breath, fatigue, and dizziness
- Risk factors include age over 65, high blood pressure, heart disease, obesity, and diabetes
- Treatment options include medications, lifestyle changes, cardioversion, and ablation procedures
What is Atrial Fibrillation
Atrial fibrillation is a condition where the heart's two upper chambers (atria) beat irregularly and too quickly, disrupting the normal flow of blood through the heart. Instead of contracting efficiently, the atria quiver, potentially allowing blood to pool and form dangerous clots. This disorder affects millions worldwide and increases the risk of serious complications including stroke.
Symptoms of AFib
Many people with AFib experience no symptoms and discover the condition during routine medical exams. Others may notice heart palpitations described as a racing, fluttering, or pounding sensation in the chest. Additional symptoms can include shortness of breath, fatigue, dizziness, chest discomfort, and fainting in severe cases.
Causes and Risk Factors
- Age over 65 significantly increases AFib risk
- High blood pressure is the leading modifiable risk factor
- Heart disease, including heart failure and valve problems
- Thyroid disorders that cause the heart to beat faster
- Obesity, diabetes, sleep apnea, and excessive alcohol consumption
Complications
The most serious complication of AFib is stroke risk, which can increase five-fold or more depending on other risk factors. Blood clots forming in the irregularly beating atria can travel to the brain. Other complications include heart failure, fainting, fatigue, and reduced quality of life due to symptoms.
Treatment Options
Treatment depends on the type and severity of AFib. Medications called rate-control drugs slow the heartbeat, while rhythm-control drugs try to restore normal rhythm. Anticoagulant medications reduce clot formation. More advanced treatments include cardioversion (electrical shock to reset heart rhythm) and ablation procedures that destroy tissue causing irregular signals.
Living with AFib
People with AFib can manage their condition effectively through medication, lifestyle modifications, and regular medical monitoring. Reducing caffeine and alcohol, managing stress, maintaining healthy weight, and treating underlying conditions like hypertension help control symptoms and prevent complications.
Related Questions
What's the difference between AFib and a normal irregular heartbeat?
Occasional irregular heartbeats are common and usually harmless, but AFib involves persistent rapid and chaotic beating of the atria. AFib requires medical attention due to stroke and heart failure risks, while occasional irregularities typically don't.
Can AFib be cured?
AFib cannot always be cured, but it can be effectively managed with medications, lifestyle changes, and procedures like ablation. Some people experience one episode (paroxysmal AFib) that resolves without treatment, while others have chronic AFib requiring ongoing management.
Is AFib life-threatening?
AFib itself is not immediately life-threatening but increases serious risks like stroke and heart failure. With proper treatment including anticoagulants and rate control, most people with AFib live normal lifespans with good quality of life.
Sources
- American Heart Association - Atrial Fibrillation Official
- Wikipedia - Atrial Fibrillation CC-BY-SA-4.0