睡眠与心理健康：全面患者指南

Overview

Atrial fibrillation, often called AFib or AF, is the most common type of arrhythmia (abnormal heart rhythm). In AFib, the upper chambers of the heart (the atria) beat irregularly and out of sync with the lower chambers (the ventricles). This can make the heart pump less efficiently and allow blood to pool, raising the risk of clots that can travel to the brain and cause a stroke.

AFib can be occasional (paroxysmal), persistent, or long-standing. Many people live well with AFib when it is properly managed. Treatment aims to control symptoms, restore a normal rhythm when possible, prevent complications like stroke, and improve quality of life.

Signs & Symptoms

Some people with AFib have no noticeable symptoms and discover it during a routine checkup. When symptoms occur, they may come and go or be constant.

• Heart palpitations (feeling of a racing, fluttering, or pounding heartbeat)
• Fatigue or low energy
• Shortness of breath, especially with activity
• Dizziness, lightheadedness, or feeling faint
• Chest discomfort or pain
• Reduced ability to exercise
• Anxiety related to the irregular heartbeat

Causes & Risk Factors

AFib often develops because of changes in the heart’s electrical system or structure. It becomes more common with age. Common risk factors include high blood pressure, coronary artery disease, heart valve problems, heart failure, previous heart attack or surgery, obesity, sleep apnea, diabetes, thyroid disorders, heavy alcohol use, smoking, and a family history of AFib. Intense endurance exercise over many years or certain lung diseases can also contribute.

Diagnosis

Doctors diagnose AFib mainly with an electrocardiogram (ECG or EKG), which records the heart’s electrical activity. If episodes are infrequent, you may wear a Holter monitor (24–48 hours) or an event monitor for longer periods. Other tests can include blood work (to check thyroid function and electrolytes), echocardiogram (ultrasound of the heart), stress testing, or implantable loop recorders for longer-term monitoring. Your doctor will also assess your stroke risk using tools such as the CHA2DS2-VASc score to decide on blood-thinning therapy.

Treatment & Management

Management is individualized and usually has three main goals: control the heart rate, restore or maintain a normal rhythm when appropriate, and prevent blood clots and stroke. Lifestyle changes support all medical treatments.

• Rate control: Medicines such as beta-blockers, calcium-channel blockers, or digoxin slow the heart rate so the ventricles can fill and pump more effectively.
• Rhythm control: Antiarrhythmic drugs or procedures such as electrical cardioversion (a controlled shock to reset the rhythm) or catheter ablation (using heat or cold energy to create small scars that block abnormal signals) aim to restore normal sinus rhythm.
• Stroke prevention: Many people need anticoagulant (blood-thinning) medicines such as warfarin or direct oral anticoagulants (DOACs) based on their stroke risk. Aspirin alone is usually not enough for AFib stroke prevention.
• Treating underlying conditions: Managing high blood pressure, sleep apnea, thyroid problems, or heart failure is essential.
• Devices or surgery: In selected cases, pacemakers, left atrial appendage closure devices, or surgical maze procedures may be considered.

Your cardiologist or electrophysiologist will discuss the benefits and risks of each option. Shared decision-making helps match treatment to your symptoms, preferences, and overall health.

Living With It

Most people with well-managed AFib can lead active, fulfilling lives. Focus on taking medicines exactly as prescribed, attending follow-up visits, tracking symptoms or pulse if advised, and adopting heart-healthy habits. Limit alcohol, avoid smoking, maintain a healthy weight, eat a balanced diet low in sodium and processed foods, stay physically active within your doctor’s guidelines, manage stress, and treat sleep apnea if present. Learn the signs of stroke and when to seek emergency care. Support groups and cardiac rehabilitation programs can also help.