Atrial Fibrillation: Symptoms, Causes, and Treatment

Atrial fibrillation (AFib) is a common heart rhythm disorder where the upper chambers of the heart beat irregularly and out of sync with the lower chambers. It can cause palpitations, fatigue, and shortness of breath. AFib increases the risk of stroke and heart failure but can be managed with medications, lifestyle changes, and medical procedures.

In plain words

Atrial fibrillation (AFib) is a common heart rhythm problem. It happens when the upper chambers of the heart beat irregularly and out of sync with the lower chambers. This can cause symptoms like a racing or fluttering heart, tiredness, and shortness of breath. AFib raises the risk of stroke and heart failure. It can be managed with medications, lifestyle changes, and medical procedures.

What is Atrial Fibrillation: Symptoms, Causes, and Treatment?

Atrial fibrillation (AFib) is a common heart rhythm disorder where the upper chambers of the heart beat irregularly and out of sync with the lower chambers. It can cause palpitations, fatigue, and shortness of breath. AFib increases the risk of stroke and heart failure but can be managed with medications, lifestyle changes, and medical procedures.

Symptoms

Early symptoms

  • Heart palpitations: A fluttering or racing sensation in the chest, often felt when the heart beats irregularly or too fast. (1) (5)
  • Fatigue: Feeling unusually tired or lacking energy, even after rest, due to the heart’s inefficient pumping. (3) (5)
  • Shortness of breath: Difficulty breathing, especially during physical activity or while lying down, caused by reduced heart function. (1) (3)
  • Dizziness: Feeling lightheaded or unsteady, often due to irregular blood flow to the brain. (5) (3)
  • Chest discomfort: Mild chest pain, pressure, or tightness, which should always be evaluated by a healthcare professional. (1) (5)

Serious or emergency symptoms

  • Severe chest pain: Intense or persistent chest pain that may indicate a heart attack or other serious complication. Seek emergency medical care immediately. (3) (5)
  • Signs of stroke: Sudden weakness, confusion, trouble speaking, or difficulty walking, which may indicate a blood clot has reached the brain. Call emergency services right away. (10) (5)
  • Heavy bleeding: Uncontrollable bleeding, especially if you take blood thinners, requires immediate medical attention. Seek emergency care. (11) (10)

Causes

Primary causes

  • High blood pressure: Chronic high blood pressure can damage the heart’s electrical system, leading to AFib. (2)
  • Heart disease: Coronary artery disease, heart valve disorders, or prior heart attacks can disrupt the heart’s normal rhythm. (2)
  • Aging: The risk of AFib increases with age, particularly after 60, due to natural changes in the heart. (2)
  • Other conditions: Thyroid problems, obesity, diabetes, and excessive alcohol use can contribute to AFib. (2)

Risk factors

Family history

Having a close relative with AFib increases your risk of developing the condition. (1)

Older age

People over 60 are at significantly higher risk of AFib due to age-related heart changes. (2)

Lifestyle factors

Smoking, physical inactivity, and excessive alcohol consumption can increase the likelihood of AFib. (1) (2)

Chronic conditions

High blood pressure, diabetes, and sleep apnea are common risk factors for AFib. (1) (2)

Diagnosis

Diagnosing AFib typically involves an electrocardiogram (ECG) to record the heart’s electrical activity. For intermittent symptoms, a portable Holter monitor may be used for continuous recording over 24-48 hours. Additional tests like echocardiograms or blood tests may be needed to identify underlying causes.

Electrocardiogram (ECG)

Records the heart’s electrical activity to detect irregular rhythms. (4) (6)

Holter monitor

Portable ECG device worn for 24-48 hours to capture intermittent symptoms. (4) (6)

Echocardiogram

Uses sound waves to create images of the heart, helping identify structural issues. (4) (6)

Blood tests

Checks for underlying causes like thyroid disorders or electrolyte imbalances. (4) (6)

Treatment

Medication options

Beta-blockers

Slows the heart rate and reduces symptoms like palpitations. (4) (9)

Calcium channel blockers

Helps control heart rate and reduce symptoms of AFib. (4) (9)

Blood thinners

Reduces the risk of stroke by preventing blood clots. (4) (9)

Antiarrhythmic drugs

Helps restore and maintain a normal heart rhythm. (4) (9)

Lifestyle and self-care

  • Limit alcohol: Excessive alcohol can trigger AFib episodes. Moderate or avoid alcohol consumption. (8) (9)
  • Quit smoking: Smoking damages the heart and increases AFib risk. Seek support to quit. (8) (9)
  • Maintain a healthy weight: Obesity is a risk factor for AFib. Weight loss can improve heart health. (8) (9)
  • Exercise regularly: Moderate exercise, like brisk walking, can improve heart health and reduce AFib symptoms. (8) (9)

Always discuss dosing and treatment changes with your own prescriber.

Possible complications

  • Stroke: AFib increases stroke risk by up to five times due to blood clots forming in the heart. (7) (10)
  • Heart failure: The heart may become unable to pump enough blood, leading to fatigue and fluid buildup. (7) (10)
  • Chronic fatigue: Persistent tiredness can significantly impact quality of life. (7) (10)
  • Dementia: Long-term AFib increases the risk of cognitive decline. (7) (10)

When to see a doctor

Routine follow-up

  • If you experience irregular heartbeats, unexplained fatigue, or dizziness, consult a doctor for evaluation. (10) (11)

Seek emergency care

  • Seek emergency care for severe chest pain, stroke symptoms, or heavy bleeding. (10) (11)

Frequently asked questions

What is Atrial Fibrillation?

Atrial fibrillation (AFib) is an irregular heart rhythm where the upper chambers of the heart beat chaotically and out of sync with the lower chambers. It can lead to serious complications like stroke and heart failure. (1) (2)

What are the first signs of Atrial Fibrillation?

Common first signs include heart palpitations (a racing or fluttering sensation), fatigue, shortness of breath, and dizziness. Some people may have no symptoms. (1) (5)

What causes Atrial Fibrillation?

AFib is often caused by high blood pressure, heart disease, aging, or other conditions like thyroid problems or excessive alcohol use. Sometimes, the cause is unknown. (2)

How is Atrial Fibrillation treated?

Treatment includes medications to control heart rate and rhythm, blood thinners to prevent clots, and procedures like cardioversion or ablation. Lifestyle changes also play a key role. (4) (9)

Can Atrial Fibrillation be cured?

While AFib can’t always be cured, it can often be managed effectively with medications, lifestyle changes, and procedures. Early treatment improves outcomes. (9) (4)

References

  1. CDC — Atrial Fibrillation source 1
  2. AHA — What is Atrial Fibrillation? source 2
  3. NHS — Atrial fibrillation source 3
  4. MedlinePlus — Atrial fibrillation source 4
  5. AHA — Symptoms of Atrial Fibrillation source 5
  6. Chesnut Medical Center — Atrial Fibrillation: Diagnosis and Treatment source 6
  7. Mayo Clinic — Atrial fibrillation - Complications source 7
  8. NHS — Living with atrial fibrillation source 8
  9. AHA — Treatment and Prevention of Atrial Fibrillation source 9
  10. CDC — Atrial Fibrillation and Stroke source 10
  11. Mayo Clinic — Atrial fibrillation - When to see a doctor source 11