— 降低風險 · MEDIUM · MCQ —
一位病人被診斷為低血鉀。護理師應監測下列哪種心電圖變化？
A client is diagnosed with hypokalemia. Which cardiac rhythm changes should the nurse monitor for?
- AShortened QT intervalQT 間期縮短
- BTall, peaked T-waves高大尖銳的 T 波
- CWide QRS complexQRS 波群變寬
- DST segment depression and U waves✓ 正解ST 段壓低與 U 波
— Explanation · 中文詳解 —
低血鉀影響心肌電傳導，典型 ECG 特徵包括 ST 段下降、T 波平坦或倒置，以及出現明顯的 U 波（U wave）。Tall, peaked T-waves 是高血鉀表現；Wide QRS 則是嚴重的電解質失衡末期表現。
Hypokalemia affects myocardial electrical conduction; classic ECG features include ST segment depression, flattened or inverted T waves, and prominent U waves. Tall peaked T waves are seen in hyperkalemia, and a widened QRS appears as a late finding in severe electrolyte disturbance.
✦ 台美臨床差異
美台護理人員對心電圖異常的辨識標準一致，均強調低血鉀致心律不整之風險。