Ablation or catheter ablation as it is sometimes referred, is a treatment that is used to control or correct certain types of abnormally fast heart rhythms. This could be something like Atrial Fibrillation (AF) or Superior Ventricular Tachycardia (SVT).
A cardiac catheter (thin, hollow, flexible tube) is inserted in to the body via an artery in the wrist or in the groin, it is then fed around the body to the heart to where the abnormal signal is located. The medical professional will then use either radiofrequency waves (radiofrequency ablation) or freezing (cryoablation) to destroy the tissue.
This procedure can be repeated if it does not work the first time. It can take several weeks to see whether the procedure has worked or not.