Key Words: Cath Lab Tech, CLT, Cardiac Catheter Lab Technician, Cardiac Catheterization, Cardiovascular Technologist, RCIS, EP Tech, Special Procedures Tech, Interventional Tech, Electrophysiology, Electrophysiology Tech, IR Tech. Assists the physician with the performance of various diagnostic and interventional procedures, by monitoring, passing instruments and catheters, observing patient response to procedure, maintaining sterile field, interpreting and evaluating diagnostic data to be utilized by the physician.