Final answer:
Iron supplementation is the protocol the nurse should anticipate for a pregnant patient with a history of rheumatic heart disease.
Step-by-step explanation:
When assessing a newly admitted pregnant patient with a history of rheumatic heart disease, the nurse should anticipate a protocol of iron supplementation.
Iron is an essential mineral that is necessary for the production of red blood cells, and pregnant women with heart disease may require extra iron to prevent further stress on the heart.
Potassium, calcium, and zinc are not specifically indicated for the prevention of stress on the heart in this situation.