Atrial Fibrillation
Atrial fibrillation (AFib) is an irregular and often rapid heart rate that can increase the risk of stroke and heart failure. It occurs when the heart's upper chambers beat out of sync with the lower chambers.
Overview
Atrial fibrillation (AFib) is an irregular and often rapid heart rate that can increase the risk of stroke and heart failure. It occurs when the heart's upper chambers beat out of sync with the lower chambers.
Understand this condition
The heart uses electrical signals to coordinate its steady beat and pump blood. In AFib, these signals become chaotic, causing the top chambers to quiver instead of squeezing properly. This prevents blood from moving efficiently into the bottom chambers and out to the body.
Why it happens
AFib usually results from damage to the heart's electrical system, often caused by long-term strain or inflammation. Over time, these chaotic signals can remodel the heart tissue, making episodes happen more frequently. Triggers like stress, alcohol, or illness can set off these irregular electrical sparks.
Real-world scenarios
- •People may notice a fluttering sensation while sitting quietly at home.
- •This often appears as sudden, unexplained exhaustion during a routine walk.
- •People may feel their pulse skipping beats or beating irregularly fast.
- •This often appears as lightheadedness when standing up or moving quickly.
Common vs serious explanations
- •Brief heart racing from sudden stress or anxiety
- •Strong heartbeat after intense physical exertion
- •Extra heartbeats caused by dehydration or low electrolytes
- •Palpitations following high caffeine or alcohol intake
- Ischemic stroke caused by a blood clot from the heart
- Heart failure due to chronic rapid heart rate
- Pulmonary embolism from restricted blood flow
- Cardiomyopathy leading to a weakened heart muscle
Symptoms
Click any symptom to analyzeCauses
- •High blood pressure (hypertension)
- •Coronary artery disease
- •Heart valve problems
- •Overactive thyroid gland
- •Sleep apnea
Risk factors
- •Advanced age
- •Obesity
- •Family history of AFib
- •Chronic conditions like diabetes or kidney disease
How it progresses
3 stages- Stage 1 — EarlyMild or intermittent symptoms; easily mistaken for something minor.Often missed
- Stage 2 — ProgressiveSymptoms become more frequent or severe.
- Stage 3 — EstablishedDaily life affected; medical care strongly recommended.
How it's diagnosed
- •Electrocardiogram (ECG/EKG)
- •Holter monitor (portable ECG)
- •Echocardiogram
- •Blood tests
Treatment options
General educational information only — no dosage advice. Always follow guidance from a qualified clinician.
- •Blood-thinning medications to prevent clots
- •Rate control medications (Beta-blockers)
- •Rhythm control medications (Anti-arrhythmics)
- •Cardioversion (electrical shock therapy)
- •Catheter ablation
- •Monitoring heart rate and rhythm
- •Reducing caffeine and alcohol intake活動
- •Stress management techniques
- •Maintaining a heart-healthy diet
Complications
- •Long-term damage if untreated
- •Heart strain
- •Reduced oxygen delivery
- •Risk of cardiac event
- •Recurrence of atrial fibrillation
Prevention
- •Don't smoke
- •Stay physically active
- •Manage blood pressure and cholesterol
When to seek help
- •Symptoms persist beyond a few days
- •Symptoms interfere with daily activities
- •New or worsening symptoms appear
- •Concerning changes related to atrial fibrillation
- Chest pain or pressure
- Sudden shortness of breath
- Fainting or collapse
- Signs of stroke (facial drooping, arm weakness)
In any emergency, call your local emergency number or go to the nearest emergency department.
Real-world questions
- ›Can Atrial Fibrillation feel like a heart attack?
- ›Can Atrial Fibrillation cause headaches?
- ›Is Atrial Fibrillation reversible?
- ›How quickly does Atrial Fibrillation progress?
- ›Is Atrial Fibrillation hereditary?
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Frequently asked questions
Possible causes of Atrial Fibrillation include High blood pressure (hypertension), Coronary artery disease, Heart valve problems, Overactive thyroid gland.
Atrial Fibrillation can be serious and may require prompt medical attention, especially if symptoms are severe or worsening.
Duration varies between individuals. Many cases improve with appropriate care, while others may persist longer and require ongoing management.
Atrial Fibrillation typically benefits from medical evaluation and should not be ignored.
Consider seeing a clinician if symptoms are severe, persistent, worsening, or if you have any concerns related to general.
Sources
Information based on general medical references such as:
Last reviewed: May 2026