What is heart ablation?

Electric Coagulation: Ablation refers to heating or freezing of part of the electrical pathways of the heart. It is carried out when a patient has abnormal cardiac rhythms (arrhythmias) that are fixable with an ablation. Catheters are used to heat and coagulate (like turning egg-white from colorless to white with heat) or cool and damage the tissue and thereby prevent it from conducting electricity.

RFA: By this, i assume you mean radiofrequency ablation or rfa procedures. These are highly specialized electrophysiology procedures used to treat specific heart rhythm disturbances (arrhythmias). It is carried out much in the same way as a heart catheterization except the heart's electrical activity is mapped and abnormal rhythms are treated with radiofrequency energy through special catheters.