Radiofrequency ablation, a kind of catheter ablation destroys or ablates areas of the heart. These areas of the heart cause arrhythmias, or disturbances in the normal rhythm of the heartbeat. During radiofrequency ablation radio waves are used to "cauterize" the tiny part of the heart muscle causing the abnormal heart rhythm.
Unless directed otherwise by your doctor, you should avoid food or drink after midnight the night before the procedure, except for normal medications. Once at the lab, you will be given an IV in your hand or arm so that you can receive fluids and medications.