護理師照護一位高血鉀病人。為預防致命併發症，應優先檢視下列哪項診斷結果？
A nurse is caring for a client with hyperkalemia. Which diagnostic finding should the nurse prioritize to prevent life-threatening complications?
- ABlood pH 7.32血液pH值7.32
- BElectrocardiogram showing peaked T waves✓ 正解心電圖顯示T波高聳
- CPotassium level 6.2 mEq/L鉀離子濃度6.2 mEq/L
- DSerum creatinine 1.8 mg/dL血清肌酸酐1.8 mg/dL
高血鉀最致命的影響在於心臟傳導。心電圖顯示 T 波高聳（Peaked T waves）代表心肌已受高血鉀嚴重影響，隨時可能發生致命性心律不整（如心室顫動），故優先權最高。其他選項如高血鉀數值、腎功能或酸鹼值雖重要，但心電圖改變直接反映心肌電生理不穩定。
The most lethal effect of hyperkalemia involves cardiac conduction. Peaked T waves on the ECG indicate that the myocardium has already been seriously affected by hyperkalemia and is at risk of fatal dysrhythmias (such as ventricular fibrillation) at any time, making this finding the top priority. Other options such as the serum potassium value, renal function, or pH are important, but the ECG change directly reflects myocardial electrical instability.
美國護理師對心電圖判讀之專業要求極高，常需獨立決定是否立即進行急救處置。