Catheter ablation has some risks. The procedure may cause:
- Bleeding, infection, and pain at the catheter insertion site.
- Damage to blood vessels. Rarely, the catheters may scrape or poke a hole in a blood vessel as they're threaded to the heart.
- Puncture of the heart.
- Damage to the heart's electrical system, which may cause you to need a permanent pacemaker. A pacemaker is a small device that's placed under the skin of your chest or abdomen to help control arrhythmias.
- Blood clots, which could lead to a stroke or other problems.
- Narrowing of the veins that carry blood from the lungs to the heart. This narrowing is called stenosis.
Also, catheter ablation involves radiation. Thus, the procedure may increase the risk of cancer, although the risk is small.
As with any procedure involving the heart, complications sometimes can be fatal. However, this is rare with catheter ablation.