EPS or electrophysiology study is a test procedure conducted to see how the electric impulses conducts through the pathways of your heart. In case the conduction pathway is normal it indicates your heart rates are normal. In case if abnormal signals are detected it indicates arrhythmia or irregular heart beats.
RFA or radiofrequency ablation is a type of invasive surgical procedure conducted to treat certain types of arrhythmias.
Both EPS and RF can be conducted at the same time. Normally a doctor assigns both the procedures together. EPS is conducted to diagnose presence of arrhythmia. Based on the nature and type of arrhythmia RFA is conducted as a treatment procedure.