HealthSheets™


Having Chemical Cardioversion

Cardioversion is a procedure that is done to return your heartbeat to a normal rhythm. It’s done when the heart is beating very fast or irregular. This is called an arrhythmia. The procedure uses medicine to change the heart’s rhythm. The medicine is given through an IV or by mouth.

What to tell your healthcare provider

Tell your healthcare provider about all the medicines you take. This includes over-the-counter medicines such as ibuprofen. It also includes vitamins, herbs, and other supplements.

Tests before your procedure

You may need blood tests before the procedure. This is to make sure the procedure is safe for you. And you may have a transesophageal echocardiography test before the procedure. This test is a special kind of ultrasound. A thin, flexible tube is put down your throat and into your esophagus. There, the tube is close to your heart. It lets your healthcare provider see if you have any blood clots. Your cardioversion will be delayed if a clot is found.

Getting ready for your procedure

Talk with your healthcare provider how to get ready for your procedure. Follow his or her instructions about what medicines to take before the procedure. This includes medicines that prevent arrhythmias. Don’t stop taking any medicine unless your healthcare provider tells you to.

If you’re at a higher risk for blood clots, your healthcare provider may want you to take blood-thinner medicine. You may take this several weeks before and after the procedure.

Make sure to:

  • Ask a family member or friend to take you home from the hospital.

  • Not eat or drink after midnight the night before your procedure, unless your healthcare provider says it’s OK.

  • Follow all other instructions from your healthcare provider.

You may be asked to sign a consent form that gives your permission to do the procedure. Read the form carefully. Ask questions if something is not clear.

On the day of your procedure

The procedure may be done in a hospital or a doctor’s office. Or it may be done in your home. A healthcare provider will give you medicine. It may be given through a vein in your arm or hand (IV). Or you may take it by mouth.

The type of medicine is based on your type of arrhythmia and your overall health. Examples of medicines that are used include:

  • Flecainide, dofetilide, propafenone, amiodarone, or ibutilide (for AFib or atrial flutter)

  • Adenosine or verapamil (for supraventricular tachycardia)

  • Amiodarone (for atrial tachycardia)

After your procedure

If you are in a hospital or doctor’s office, your heart rate and rhythm will be checked. If you are treated at home, you will need careful follow-up with a cardiologist.

Chemical cardioversion may work very quickly. Or it may take hours to work. In rare cases, it may take up to a few days to work. Your healthcare provider may want to check your heart rhythm for a period of time after you have been given the medicine. You may need an electrical cardioversion if the medicine did not work. Your healthcare team will create a new care plan for you if this occurs.

Ask your healthcare provider about medicine side effects to watch for.

Follow-up care

Make sure to keep all of your follow-up appointments.

When to call your healthcare provider

Call your healthcare provider right away if you have any of these:

  • Trouble breathing or chest pain (call 911)

  • Dizziness

  • Fainting

  • Severe side effects from the medicine

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