How you prepare

By Mayo Clinic Staff

You'll need to stop eating and drinking about eight to 12 hours before your procedure. If you take any medications, ask your doctor if you should continue taking them before your procedure.

Your doctor should let you know if you need to follow any other special instructions. In some cases you will be instructed to stop taking medications to treat a heart arrhythmia for a period of days to months before your procedure. If you have an implanted heart device, such as a pacemaker or implantable cardioverter-defibrillator, talk to your doctor to see if you need to take any special precautions.

Jun. 22, 2011