Atrial Fibrillation

Sometimes, the atria, the upper chamber of the heart, starts beating irregularly, and the sync between them and the ventricles, the lower chambers, is broken. This is called atrial fibrillation (Afib), a serious heart rhythm disorder that impacts millions of people worldwide. It affects your blood flow, leading to feelings of fatigue and dizziness. It also increases your risk of heart failure or stroke. Understanding atrial fibrillation meaning, symptoms, and causes is essential to detect it early and manage it properly.

1.0Types of Atrial Fibrillation

The atrial fibrillation meaning lies in its name: “fibrillation” refers to rapid, irregular contractions. When you have a normal heart, its electrical system maintains a regular rhythm. However, if you have Afib, disorganised signals can lead to chaotic atrial activity and impact the blood pumping.

The following classification of atrial fibrillation has been done based on the underlying causes and duration:

A. Long-Standing Persistent Atrial Fibrillation

This is characterised by an irregular heart rhythm continuing for over a year. It requires long-term treatment.

B. Permanent Atrial Fibrillation

In this, the irregular rhythm actually becomes the normal state. Instead of restoring the natural rhythm, the professionals focus on ensuring that there are no complications and the symptoms are managed.

C. Paroxysmal Atrial Fibrillation

Here, with little to no intervention, the heart gets back to its normal rhythm. These episodes might last for a few minutes or days.

D. Persistent Atrial Fibrillation

In this type, the abnormal heart rhythm lasts for more than 7 days and requires medical treatment to restore it.

E. Nonvalvular Atrial Fibrillation

This type of atrial fibrillation is caused by other risk factors like diabetes or high blood pressure, and not by a heart valve disorder.

2.0Atrial Fibrillation Symptoms and Risk Factors

Atrial Fibrillation Symptoms

Individuals with atrial fibrillation may experience a variety of symptoms, though the severity and presence of these symptoms can vary widely. Some of the most commonly reported atrial fibrillation symptoms include:

• Palpitations – A rapid, irregular heartbeat or a fluttering sensation in the chest.
• Dizziness – Feeling lightheaded or unsteady.
• Fainting – Episodes of loss of consciousness may occur in some cases.
• Weakness – A general sense of reduced strength or energy.
• Fatigue – Persistent tiredness or exhaustion, even after rest.
• Shortness of Breath – Difficulty breathing, especially during physical activity.
• Chest Pain – Discomfort or tightness in the chest, which should be evaluated immediately.
• Asymptomatic Cases – Some individuals with atrial fibrillation do not experience any noticeable symptoms and may only be diagnosed during a routine check-up.

In more serious cases, atrial fibrillation can lead to major complications such as heart failure and stroke, especially if left untreated.

Risk Factors

Several health and lifestyle factors contribute to the development of AFib:

3.0Diagnosis of Atrial Fibrillation

Atrial fibrillation is often discovered during routine checkups, as many people don’t notice symptoms. To diagnose AFib, healthcare providers review your medical history, ask about symptoms, and perform a physical exam.

Several tests help confirm AFib and its cause:

• Electrocardiogram (ECG): The main test to detect irregular heart rhythms.
• Blood tests: Identify underlying conditions like thyroid disorders or electrolyte imbalances.
• Holter monitor: A portable device that records heart activity for 24–48 hours.
• Event recorder: Worn up to 30 days, it records when symptoms occur.
• Implantable loop recorder: Monitors the heart continuously for up to three years.
• Echocardiogram: It uses ultrasound to assess heart structure, function, and blood flow.
• Exercise stress test: Evaluates how the heart responds to physical activity.
• Chest X-ray: Checks heart size and rules out lung issues.

These tests guide appropriate atrial fibrillation treatment based on the individual’s condition.

4.0Atrial Fibrillation Treatment

The goal of atrial fibrillation treatment is to restore normal heart rhythm, control heart rate, and prevent blood clots. Your treatment plan depends on how long you’ve had AFib, your symptoms, and underlying causes.

Medications are often the first step:

• Beta blockers and calcium channel blockers help control heart rate.
• Anti-arrhythmic drugs may restore rhythm but are used cautiously due to side effects.
• Blood thinners like warfarin, apixaban, or rivaroxaban reduce stroke risk by preventing clots.

Cardioversion is used to reset the heart rhythm:

• Electrical cardioversion delivers controlled shocks.
• Drug cardioversion uses medications through IV or orally.

Catheter ablation is a common procedure where heat, cold, or electric pulses destroy faulty heart tissue, causing AFib. If necessary, AV node ablation may be done, followed by pacemaker placement. Surgical options like the maze procedure or left atrial appendage closure may be needed in complex cases or if blood thinners aren’t suitable.

Even with treatment, AFib can return. Lifelong medication or follow-up procedures might be necessary to manage symptoms and reduce the risks of complications like stroke or heart failure.