ATRIAL FIBRILLATION
Atrial fibrillation (AF) is one of the most common heart rhythm disorders. It occurs when the electrical signals in the atria become rapid and disorganized, resulting in an irregular heartbeat and sometimes a rapid heart rate.
Atrial fibrillation may occur intermittently and come and go, or it may persist for longer periods. The appropriate treatment depends on the type and duration of atrial fibrillation, the patient's symptoms, cardiovascular risk factors and associated medical conditions.
SYMPTOMS OF ATRIAL FIBRILLATION
Some patients may have no symptoms, while others may experience:
• Palpitations or awareness of an irregular heartbeat.
• Rapid heartbeat.
• Shortness of breath.
• Fatigue and reduced energy.
• Dizziness or lightheadedness.
• Reduced exercise tolerance.
• Chest pain or discomfort.
• Near-fainting or fainting in some cases.
WHY IS ATRIAL FIBRILLATION IMPORTANT?
The importance of atrial fibrillation is not limited to an irregular heartbeat. Some patients with AF have an increased risk of blood clot formation inside the heart.
A blood clot can travel to the brain and cause a stroke. Therefore, every patient with atrial fibrillation should have an individualized assessment of their risk of stroke to determine whether anticoagulant treatment is appropriate.
HOW IS ATRIAL FIBRILLATION DIAGNOSED?
Diagnosis requires documentation of the heart rhythm. Investigations may include:
• Electrocardiogram (ECG).
• 24-hour or longer Holter monitoring.
• Extended cardiac rhythm monitoring when necessary.
• Echocardiography (Echo).
• Blood tests, including thyroid function and electrolyte levels when appropriate.
• Additional cardiac investigations depending on the patient's symptoms and clinical condition.
THE ROLE OF HOLTER MONITORING
Atrial fibrillation can be intermittent and may not be present during a standard ECG.
Holter monitoring continuously records the heart's electrical activity while the patient performs normal daily activities. This can help detect episodes of atrial fibrillation and correlate them with symptoms such as palpitations, dizziness or shortness of breath.
RISK FACTORS FOR ATRIAL FIBRILLATION
Atrial fibrillation may be associated with several conditions and risk factors, including:
• Increasing age.
• High blood pressure.
• Coronary artery disease.
• Heart valve disease.
• Cardiomyopathy or weakened heart muscle.
• Heart failure.
• Overactive thyroid gland.
• Obesity.
• Sleep apnea.
• Certain lung diseases.
• Alcohol and some stimulants in certain patients.
TREATMENT OF ATRIAL FIBRILLATION
Treatment depends on the type of atrial fibrillation, symptoms, duration of episodes, heart rate, risk of stroke and the patient's overall health.
Treatment may include:
• Controlling the heart rate.
• Restoring and maintaining normal heart rhythm in selected patients.
• Antiarrhythmic medications when appropriate.
• Anticoagulant medications to reduce the risk of blood clots in patients who require them.
• Treatment of underlying conditions and cardiovascular risk factors.
• Cardioversion in appropriate patients.
• Catheter ablation for selected patients.
STROKE PREVENTION
One of the most important goals in the management of atrial fibrillation is reducing the risk of stroke.
Doctors use established clinical risk factors to assess a patient's risk of stroke and determine whether anticoagulant medication is appropriate.
Anticoagulant medications should not be started, stopped or changed without medical advice, as the decision requires an individualized assessment balancing the risk of stroke against the risk of bleeding.
CATHETER ABLATION FOR ATRIAL FIBRILLATION
Catheter ablation may be an appropriate treatment option for selected patients with atrial fibrillation.
During the procedure, specialized catheters are introduced into the heart to identify the electrical areas responsible for initiating or maintaining atrial fibrillation. Specialized ablation techniques are then used to electrically isolate these areas, with the aim of reducing recurrent episodes and maintaining a more regular heart rhythm.
The suitability of catheter ablation depends on several factors, including the type of atrial fibrillation, symptoms, age, overall health and the presence of other heart conditions.
ATRIAL FIBRILLATION AND LIFESTYLE
Managing cardiovascular risk factors can improve overall heart health and may help reduce recurrent episodes of atrial fibrillation in some patients.
Important measures include:
• Maintaining a healthy body weight.
• Controlling blood pressure.
• Managing diabetes.
• Controlling cholesterol.
• Regular physical activity appropriate for the patient's condition.
• Stopping smoking.
• Evaluation and treatment of sleep apnea when present.
• Avoiding individual triggers that the patient recognizes as being associated with symptoms.
WHEN DOES ATRIAL FIBRILLATION REQUIRE URGENT MEDICAL EVALUATION?
Urgent medical assessment is required when severe or very rapid palpitations are associated with chest pain, significant shortness of breath, severe dizziness, fainting, sudden weakness or neurological symptoms that may indicate a stroke.
SPECIALIZED EVALUATION
Atrial fibrillation varies significantly from one patient to another, and there is no single treatment strategy that is appropriate for everyone.
Evaluation includes the type and duration of atrial fibrillation, symptoms, heart rate, stroke risk, heart function and associated medical conditions.
The treatment plan may include observation and follow-up, medications, heart-rate control, rhythm restoration, cardioversion or catheter ablation in appropriately selected patients.
If you experience recurrent palpitations or an irregular heartbeat, an ECG or Holter monitor may help identify the cause of your symptoms and determine whether atrial fibrillation or another heart rhythm disorder is present.