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Cardiac Catheter Cryoablation

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by Peterson EA

(Cryotherapy; Cryoablation)


What to Expect

Prior to Procedure

Your doctor will likely do the following:
  • Perform electrophysiology studies to pinpoint the location of the abnormal rhythms
  • Instruct you to stop taking medications previously used to control your arrhythmia
  • Prescribe medication to prevent clotting
Leading up to your procedure:
  • Do not to eat or drink anything for up to eight hours before the procedure.
  • Follow your doctor’s instructions.


A local anesthetic will be given by needle. It will numb the area where a tube called a catheter will be inserted. You will also receive a mild sedative through an IV in your arm. This will help you to relax during the procedure.

Description of Procedure

The special ablation catheter will be inserted into a blood vessel in the groin, upper thigh area, arm, or wrist. The area will be cleaned. It will also be numbed with anesthesia.
Pathway of Catheter Toward the Heart
PIB image for cryoblation
Copyright © Nucleus Medical Media, Inc.
The catheter will be passed up the blood vessel to your heart. Your doctor will be able to see the catheter with a special x-ray machine. It will be seen on a nearby screen.
Your doctor will locate the origin of your arrhythmia. This will be done by setting off the arrhythmia with a special catheter tip. When the location is found, the area will be cooled with the tip of the catheter. If it is the right area, the cold will temporarily stop the arrhythmia. If it is not the right area, the tip is removed and the tissue will not have any damage.
When the right area is found, the tip of the ablation catheter will be cooled down to -70°C. This extreme cold will freeze and scar the heart tissue. The damage will eliminate the arrhythmia. Your doctor will then try to reproduce the arrhythmia. The tip will be applied again until the arrhythmia can no longer be reproduced.

Immediately After Procedure

You will be moved to a recovery room. The staff will observe you for a few hours for symptoms, rhythm problems, and bleeding from the catheter sites. You may feel groggy from the sedative.
You will likely need to lie still and flat on your back for a period of time. A pressure dressing may be placed over the area where the catheter was inserted to help prevent bleeding. It is important to follow directions.

How Long Will It Take?

3-6 hours or longer

How Much Will It Hurt?

You may feel some minor discomfort as the catheter is inserted. You may feel light-headed, experience a rapid heartbeat, or experience chest pain during the freezing process.

Average Hospital Stay

Most patients stay overnight for further observation. Your doctor may choose to keep you longer if complications arise.


American Heart Association

National Heart, Lung, and Blood Institute



Health Canada

Women's Health Matters



Ablation for arrhythmias. American Heart Association website. Available at: Updated November 8, 2012. Accessed August 8, 2013.

Catheter ablation of arrhythmias. Circulation. 2002;106:e203.

Cryoablation for atrial fibrillation in association with other cardiac surgery. National Institute for Clinical Excellence website. Available at: Accessed August 8, 2013.

6/3/2011 DynaMed's Systematic Literature Surveillance Mills E, Eyawo O, Lockhart I, Kelly S, Wu P, Ebbert JO. Smoking cessation reduces postoperative complications: a systematic review and meta-analysis. Am J Med. 2011;124(2):144-154.e8.


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