一位病人被診斷為高血鉀症。護理師應將下列哪項發現列為評估心臟併發症的優先重點？
A client is diagnosed with hyperkalemia. Which assessment finding should the nurse identify as a priority for potential cardiac complications?
- AReports of numbness around the mouth主訴嘴周麻木
- BMuscle weakness in the lower extremities下肢肌肉無力
- CIncreased intestinal motility腸道蠕動增加
- DPresence of peaked T waves on the ECG✓ 正解心電圖出現尖峰 T 波
高血鉀症（Hyperkalemia）對心肌電生理具有致命影響。鉀離子異常會改變心室再極化（Repolarization）過程，心電圖上最常見的早期變化即為尖峰 T 波（Peaked T waves）。若不及時干預，可迅速進展為 PR 間期延長、QRS 波變寬，最終導致心室顫動（Ventricular Fibrillation）或心搏停止（Asystole）。因此，監測心電圖是評估該病患心臟併發症的優先核心。
Hyperkalemia has a fatal effect on cardiac electrophysiology. Abnormal potassium levels alter ventricular repolarization, and the most common early ECG change is peaked T waves. Without timely intervention, this can rapidly progress to PR-interval prolongation, widened QRS complexes, and ultimately ventricular fibrillation or asystole. Therefore, ECG monitoring is the core priority in assessing cardiac complications in this client.