Final answer:
The nurse should assess the client with heart failure who is complaining of shortness of breath first after receiving the change-of-shift report.
Step-by-step explanation:
The nurse should assess the client with heart failure who is complaining of shortness of breath first after receiving the change-of-shift report. Heart failure is a life-threatening condition that requires immediate attention. Shortness of breath can be a sign of worsening heart failure, and timely intervention is necessary to prevent complications.