Cath lab RNs usually work with people who have chronic ailments and older patients with heart conditions. They provide direct nursing care to patients undergoing therapeutic and diagnostic cardiac procedures. Responsibilities include examining patients, preparing them before procedures and monitoring their status with imaging equipment to ensure there is adequate blood flow throughout their body. Cath lab RNs also look for blockages that may indicate a need for further intervention. Cath lab RNs are responsible for post-procedure patient care, as well. They teach patients about the recovery process, coordinate discharge planning and make referrals to ensure continuity of care.