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In the cath lab, registered nurses (RNs) play a vital role in ensuring patient safety and the smooth execution of procedures such as angiograms, angioplasties, and stent placements. Their responsibilities include thoroughly reviewing patient medical histories, test results, and pre-procedure checklists to assess readiness and identify potential risks. RNs are responsible for establishing intravenous (IV) lines, administering medications such as sedatives or contrast agents, and monitoring the patient's vital signs throughout the procedure. They actively participate in pre-procedure time-outs to verify patient identity, procedure details, and allergies, ensuring adherence to safety protocols. Additionally, RNs provide patient education, emotional support, and post-procedure care instructions, making their role essential for optimal patient outcomes and safety in the cath lab environment.