This procedure is similar to an electrophysiology study. Heat is applied to the tip of the catheter to destroy a small part of the tissue involved in rhythm abnormalities of the heart. A special catheter (thin, flexible tube) is used and can be threaded up into the heart from the groin area or another site. The physician can locate the area of the heart where the abnormal heart rhythm originates. Heating the tip of the catheter with radiofrequency energy can destroy the abnormal area of the heart muscle, thus restoring the normal heartbeat.