Case types: Procedures include EP ablations, device implantations (pacemakers, ICDs), lead extractions, cardioversions, left and right heart caths, transvenous pacing, Impella insertions/removals, peripheral cases, Watchmans, Valve Procedures, PFOs, and ECMO. Cardiac Catheterization Laboratory (CCL) Nurse This position in the specialized cardiac catheterization laboratory involves supporting a variety of cases including electrophysiology (EP), catheterization (cath), and structural procedures.