Final answer:
The nurse should recognize the presence of a new heart murmur as a potential complication when caring for a client with endocarditis.
Step-by-step explanation:
When caring for a client with endocarditis, the nurse should recognize the presence of a new heart murmur as a potential complication. Endocarditis is an infection of the inner lining of the heart, including the heart valves. It can lead to the formation of vegetations on the valves, which can cause turbulent blood flow and result in the development of a new heart murmur.