AV Node Ablation Procedure

The AV (atrioventricular) node ablation is a medical procedure used to treat certain types of abnormal heart rhythms, also known as arrhythmias. The procedure involves the use of catheter ablation to destroy or disrupt the electrical pathway between the atria and ventricles in the heart.

What is the AV Node?

The AV node is a small group of cells located between the atria and ventricles in the heart. It acts as a relay station, allowing electrical signals to pass from the atria to the ventricles, causing the heart to beat. The AV node helps regulate the heartbeat by delaying the electrical signal before it reaches the ventricles.

Why is AV Node Ablation Performed?

AV node ablation is typically performed to treat certain types of arrhythmias, including:

• Atrial fibrillation (AFib)
• Atrial flutter
• Supraventricular tachycardia (SVT)
• AV nodal reentrant tachycardia (AVNRT)

These arrhythmias can cause symptoms such as palpitations, shortness of breath, and fatigue. AV node ablation may be recommended when other treatments, such as medication or cardioversion, have not been effective in controlling the arrhythmia.

How is AV Node Ablation Performed?

The procedure is typically performed in an electrophysiology laboratory by a cardiologist or electrophysiologist. The patient is usually under local anesthesia and sedation during the procedure.

1. A catheter (a thin, flexible tube) is inserted through a vein in the leg or arm and guided to the heart using X-ray imaging.
2. The catheter is positioned near the AV node, and a special mapping catheter is used to identify the exact location of the AV node.
3. Once the AV node is located, a type of energy called radiofrequency (RF) energy is delivered through the catheter to destroy or disrupt the electrical pathway between the atria and ventricles.
4. The procedure typically takes several hours to complete, and the patient may need to stay in the hospital overnight for observation.

Risks and Complications

As with any medical procedure, there are risks and complications associated with AV node ablation. These include:

• Bleeding or bruising at the catheter site
• Infection
• Damaged heart tissue or valves
• Abnormal heart rhythms (including complete heart block)
• Pacemaker implantation may be required after the procedure

After the Procedure

After AV node ablation, patients typically need to:

• Avoid strenuous activities for several days
• Take medications as prescribed by their doctor
• Attend follow-up appointments with their cardiologist or electrophysiologist
• Use a pacemaker (if implanted) to regulate their heartbeat

It's essential for patients to discuss any concerns or questions they have about the procedure with their doctor before undergoing AV node ablation.