Electrical cardioversion

Need to know

• What happens icon plus

  External cardioversion is usually done under general anaesthetic, meaning you'll be asleep. Your consultant will place large sticky pads on your front and back, which are connected to a defibrillator machine. This machine gives your heart a controlled electric shock to make it beat normally again. For an internal cardioversion, you'll be given local anaesthetic to numb your groin. Your consultant will insert a small tube into the vein at the top of your leg to allow a fine wire to be threaded into your heart. This wire will be connected to the defibrillator machine to deliver an internal shock. The entire process takes around 10 to 20 minutes.

• How to prepare icon plus

  Your consultant will tell you how to prepare. It’s important to let us know if you’re taking any medication as you may need to stop taking it before your procedure. You’ll be asked to stop eating and drinking a few hours beforehand. Like all procedures, there may be some risks and side effects involved. Your consultant will explain these to you and answer any questions you have.

• Afterwards icon plus

  You should be able to go home on the day of your procedure. Please arrange for someone to travel home with you. Due to the effects of sedation, you won’t be able to drive for the first 24 hours. Make sure you get plenty of rest during this time. If you had an internal cardioversion, you should rest for three to four days to allow the top of your leg to heal. Your consultant will discuss the procedure with you and let you know when you can get back to your usual routine and activities. They’ll also give you advice on medication, exercise, travel, diet and alcohol.