A client with Hashimoto’s thyroiditis and a history of two myocardial infarctions and coronary artery disease is to receive levothyroxine (Synthroid). Because of the client’s cardiac history, the nurse would expect that the client’s initial dose for the thyroid replacement would be which of the following（）
A. 25 g/day, initially.
B. 100 g/day, initially.
C. Delayed until after thyroid surgery.
D. Initiated before thyroid surgery.
参考答案：A
解析：
Elderly clients and clients with cardiac disease should begin with low-dose levothyroxine increased at 2- to 4-week intervals until 100 g/d is reached. This slow titration prevents further cardiac stress. Younger clients would be started on the usual maintenance dose of 100 g/d. Clients with Hashimoto’s thyroiditis don’t require surgical intervention.