Prioritizing Actions in Post-Operative Hemodynamic Instability

A nurse is caring for a patient who is post-operative following a cardiac procedure. The patient is being monitored for changes in hemodynamic status. Upon assessment, the nurse notes that the patient’s heart rate is 110 bpm, blood pressure is 88/54 mmHg, and urinary output is 25 mL over the last hour. The nurse is concerned about potential hemodynamic instability. Which of the following actions should the nurse prioritize?