A 35-year-old client is undergoing a brain computed tomography (CT) scan because of continued migraine headaches. He’s placed in the CT scanner and suddenly begins to complain of palpitations, sweating, shortness of breath, and shaking. The client is most likely experiencing（）
A. an allergic reaction.
B. a myocardial infarction (MI).
C. a panic attack.
D. a hypoglycemic episode.
参考答案：C
解析：
Considering the circumstances surrounding these symptoms, they most probably signal a panic attack, which is a period of intense fear or discomfort that develops abruptly, and peaks in 10 minutes. An allergic reaction would have a precipitating cause and may also include a cutaneous reaction or edema. An MI would involve chest pain or cardiac compromise. Hypoglycemia rarely includes shortness of breath but would need to be differentiated by obtaining the client’s blood glucose level.