Final answer:
The charge nurse should assign the 44-year-old client diagnosed with a MI to the new graduate nurse as it provides a learning opportunity on a common condition in cardiac units.
Step-by-step explanation:
When making assignments for clients on a cardiac unit, the charge nurse should consider the acuity and complexity of each patient's condition. Considering this, it would be most appropriate to assign the 44-year-old client diagnosed with a myocardial infarction (MI) to the new graduate nurse. Although unstable angina and cardiac catheterization are also serious conditions, the 44-year-old client with an MI may be more suitable for the new graduate nurse since it is a common condition seen in cardiac units and allows for learning opportunities.