Atrial Fibrillation and Stroke Risk Management
What is Atrial Fibrillation (AF)?
Your heart is divided into 4 chambers. The 2 upper chambers are called the left and right atrium, and the lower 2 chambers are called the left and right ventricles. With each beat of your heart, blood is pumped to and from other parts of the body. The pumping is controlled by your heart’s electrical system. When resting, a normal adult heart usually beats 60-120 times per minute
Atrial fibrillation (AF) is an irregular heart rhythm condition that affects the upper chambers (atria) of the heart. This arrhythmia prevents blood from being pumped efficiently to the rest of your body. AF itself is not life-threatening but it can lead to stroke and heart failure, so it has potentially serious side effects.
When AF occurs, disorganized electrical signals cause the atria to quiver rapidly and irregularly, instead of beating in a regular rhythm. Because the heart chambers are not working properly, this can reduce the heart’s ability to pump blood efficiently to the rest of the body.
What are the symptoms of atrial fibrillation (AF)?
Symptoms may vary depending on the severity of your case, its causes and your overall health. You may notice:
What are the risk factors of atrial fibrillation (AF)?
Your risk factors for atrial fibrillation increases if you have the risk factors below:
Previous
Next
Previous
Next
What are the causes of atrial fibrillation (AF)?
The causes of AF are often unclear. AF may be caused by:
- Heart abnormality from birth
- Damage to the heart structure from a heart attack
- Heart valve problems
- People with otherwise normal healthy hearts may also develop AF.
Know Your Treatment Options at CVSKL
From medication management and lifestyle modifications to advanced interventions like catheter ablation, our treatment plans are personalized to address the specific needs and preferences of each patient.
Medication such as calcium channel blockers and beta blockers can be used to help slow the conduction of electrical impulses to maintain a slower heart rate:
- Rate control: helps lower heart rate and regulate the pace of electrical currents.
Rhythm control: helps to keep heartbeat and rhythm patterns normal.- Anticoagulants (“blood thinners”): to reduce the risk of blood clot formation that can lead to stroke or to treat an existing blood clot.
Rhythm control: helps to keep heartbeat and rhythm patterns normal.Cardioversion is a medical procedure that restores a normal heart rhythm in people with certain types of abnormal heartbeats (arrhythmias). It is usually done by sending electric shocks to your heart through electrodes placed on your chest. It’s also possible to do cardioversion with medications.
Catheter ablation is a minimally invasive procedure used to treat abnormal heart rhythms (arrhythmias). It works by targeting and disabling the small areas of heart tissue that are causing faulty electrical signals, helping the heart return to a normal rhythm.
What is the Left Atrial Appendage (LAA)?
The left atrial appendage (LAA) is a small pouch in the upper left chamber of the heart. In people with atrial fibrillation (AF), the heart beats irregularly, which can cause blood to pool inside this pouch instead of flowing smoothly. When blood stays in this area, it can form a clot. If a clot travels from the heart to the brain, it will cause a stroke.
What is LAAO and why is it needed?
Left atrial appendage occlusion (LAAO) is a procedure designed to reduce stroke risk by sealing off this pouch. By closing the LAA, it prevents clots from leaving the heart and entering the bloodstream.
Blood Thinners vs LAAO
For most patients with AF, doctors prescribe blood thinners (anticoagulants) to reduce stroke risk. However, some patients:
- Have a high risk of bleeding
- Cannot tolerate long-term medication
- Have other medical conditions that make anticoagulants unsafe
For these patients, LAAO offers an alternative approach to stroke prevention.
How does the procedure work?
LAAO is performed using a minimally invasive catheter-based technique:
- A thin tube is inserted through a vein (usually from the groin)
- It is guided safely into the heart and specifically to the left atrium
- A small device is placed at the opening of the LAA to seal it off
Doctors use imaging such as:
- Transesophageal echocardiography (TEE), a specialised ultrasound of the heart.
- Fluoroscopy (real-time X-ray guidance)
to ensure the device is positioned accurately and securely into the left atrium.
Who may benefit from LAAO?
LAAO is typically considered for patients with non-valvular atrial fibrillation who:
- Have a high risk of stroke
- Are not suitable for long-term blood thinners
- Have a high bleeding risk
- Cannot tolerate anticoagulants due to other medical conditions.
FAQ
Diagnosis involves physical examination, reviewing medical history, electrocardiogram (ECG/EKG), Holter monitor, event monitor, echocardiogram, blood tests, and sometimes other tests to assess overall heart health.
AF can be a serious medical condition that should be treated no matter what level of symptoms you experience. Without effective treatment, AF may lead to stroke, heart failure and other health complications.
Afib increases the risk of stroke due to blood clots forming in the heart and travelling to the brain. It can also lead to heart failure, chronic fatigue, and other heart-related complications if left untreated.
While there is no cure for atrial fibrillation, it can be managed effectively through lifestyle changes, medications, procedures like cardioversion (electrical or chemical), catheter ablation, and sometimes surgery
Catheter ablation may be recommended if medications fail to control symptoms or if there’s a desire to reduce reliance on long-term medications. It involves inserting catheters into the heart to destroy abnormal tissue causing irregular heart rhythms.
While some risk factors for AFib are beyond control, such as age and genetics, lifestyle modifications and managing underlying health conditions can significantly reduce the risk of developing or worsening atrial fibrillation.
People can live long and healthy lives with AF. Controlling your risk factors for heart disease and stroke and knowing what could possibly trigger your AF will help improve your long-term management of AF. Your electrophysiologist can help you manage it for life.