— 生理適應 · EASY · MCQ —
護理師照顧一位血鉀值為 6.2 mEq/L 的病人，預期會觀察到下列哪種心電圖（ECG）變化？
A nurse is caring for a client with a potassium level of 6.2 mEq/L. Which of the following ECG changes should the nurse expect to see?
- AShortened PR intervalPR 間期縮短
- BProminent U waves明顯的 U 波
- CTall, peaked T waves✓ 正解高大尖銳的 T 波
- DST-segment depressionST 段壓低
— Explanation · 中文詳解 —
高血鉀（>5.0 mEq/L）最典型的心電圖變化是 T 波高尖（Tall, peaked T waves），隨後可能出現 QRS 變寬及 P 波消失。U 波（B）和 ST 段壓低（D）通常與低血鉀相關。
Hyperkalemia typically manifests on an ECG as tall, peaked T waves due to accelerated ventricular repolarization. Other findings may include a prolonged PR interval and widened QRS complex, whereas prominent U waves and ST-segment depression are associated with hypokalemia.
✦ 台美臨床差異
台美臨床對於高血鉀的 ECG 判讀原則一致，皆為 ACLS 基礎內容。