Atrial fibrillation is the most common type of abnormal heart rhythm. With atrial fibrillation, electrical impulses don't follow a normal pathway through the heart. As a result, the heart doesn't beat normally or pump blood properly.
Having atrial fibrillation can lead to more than an abnormal heart beat. Patients experiencing atrial fibrillation are at risk for:
- Blood clots
- Heart attack
- Heart failure
- Chronic fatigue
Radiofrequency Ablation for Atrial Fibrillation
University of Chicago Medicine heart surgeons have been successfully treating atrial fibrillation for decades, and we offer the most advanced techniques to correct this condition. Surgical ablation (also referred to as a modified Maze procedure or Mini Maze procedure) involves the use of radiofrequency waves (modified electrical energy) to create precise scar lines on the heart's surface. These scars redirect the erratic electrical impulses of atrial fibrillation to a normal electrical pathway through the heart. Our surgeons use specially designed instruments to deliver the radiofrequency waves to the abnormal heart tissue.
Minimally Invasive & Robotic Surgical Ablation
In many cases, surgical radiofrequency ablation can be performed using minimally invasive approaches, including robot-assisted techniques. Our world-renowned robotic heart surgeon performs surgical radiofrequency ablation on a beating heart without requiring the use of a heart-lung machine.
Surgical radiofrequency ablation can be performed in conjunction with other heart surgeries, such as mitral valve repair or coronary artery bypass for patients with co-existing heart conditions or can be a stand-alone procedure for patients with atrial fibrillation.
What to Know About Surgical Ablation
Surgical radiofrequency ablation for atrial fibrillation offers the following benefits:
- 75 to 90 percent cure rate of atrial fibrillation
- Reduction in risk of blood clots and stroke
- Fewer or no symptoms related to abnormal heart rhythms
- Reduction or discontinuation of blood thinners such as Coumadin
- Reduction or discontinuation of antiarrhythmic drugs such as Amiodarone
- Most patients who have had the procedure report an ability to exercise more frequently and for longer periods of time
In some cases, the procedure will reduce the size of the atria, therefore lessening the risk for other complications, such as heart failure.
Additional benefits of minimally invasive surgical ablation include:
- No splitting of the breastbone (sternum)
- Faster recovery than with a large chest incision
- Less time spent in the hospital
- Less pain, because the incisions are small
- Minimal blood loss
- Little scarring
Radiofrequency ablation for atrial fibrillation is an option if:
- You have lone atrial fibrillation
- Your atrial fibrillation is not well-controlled by medication
- You have intermittent atrial fibrillation that is disabling
- You require another type of heart surgery procedure, such as mitral valve surgery or coronary artery bypass surgery
- You have a history of stroke or cannot take Coumadin
You may have heard about the Maze procedure, a surgical approach to treating atrial fibrillation that entails precise cutting of heart tissue to stop the abnormal heart rhythms. While this is an effective approach to treat atrial fibrillation, it does pose greater risks and complications than the radiofrequency approach.
In contrast to the Maze procedure, surgical radiofrequency ablation (modified Maze procedure) offers the following benefits:
- It is usually performed without opening the chest through small, finger-sized ports
- No need to use a heart-lung machine
- No cutting or sewing of heart tissue
- Significantly shorter operative time and recovery time in the hospital
Catheter ablation is similar to surgical ablation in the sense that both procedures are performed for the same purpose and they both use radiofrequency waves to treat abnormal heart rhythms. Catheter ablation involves the use of a catheter that is threaded through the leg and into the heart. The catheter is equipped with a device that delivers radiofrequency waves to the source of the arrhythmia. An electrophysiologist performs this procedure in a catheterization lab.
The surgical procedure is performed through small holes in the chest, usually with robotic assistance, and has the added benefit of ligating the left atrial appendage (the source of clots and embolic stroke in patients with atrial fibrillation).
Occasionally, for patients with long-standing atrial fibrillation, the two procedures are combined (hybrid ablation). Our expert electrophysiologists team up with our highly experienced robotic heart surgeon to get the maximum benefit from the two approaches in treating the rhythm problem.