Glucocorticoids are important in the treatment of inflammatory diseases; however, their use is associated with many adverse effects on multiple systems. The utility of glucocorticoids has to be weighed against the patient’s ability to withstand the problems that are likely to arise. High-dosage glucocorticoid treatment can result in which ECG changes?
糖皮质激素在炎症性疾病的治疗中很重要；然而，其使用与多个系统的许多不良反应相关。必须权衡糖皮质激素的效用与患者承受可能出现的问题的能力。大剂量糖皮质激素治疗可导致哪些心电图改变？
(A) Appearance of delta wave
(B) Appearance of U wave
(C) Peaked T wave
(D) PR segment elongation
(E) ST segment elevation
答案解析：
急性大剂量糖皮质激素治疗可通过与盐皮质激素受体的交叉反应引起电解质水平的变化，从而引起钠潴留和钾耗竭。低钾血症在心电图上表现为 U 波，U波是跟随 T 波的小波。
正确答案：B
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