— 生理適應 · EASY · MCQ —
一位 55 歲高血壓病史病人主訴突發性、壓迫性胸痛並輻射至左下顎。哪項檢查是評估心肌損傷的優先項目？
A 55-year-old client with a history of hypertension reports a sudden, crushing chest pain that radiates to the left jaw. Which diagnostic test is the priority to assess for myocardial injury?
- AChest X-ray胸部 X 光
- BComplete blood count全血球計數
- CEchocardiogram心臟超音波
- DSerum troponin levels✓ 正解血清肌鈣蛋白濃度
— Explanation · 中文詳解 —
心肌肌鈣蛋白（Troponin）具有高度心臟專一性，是診斷急性心肌梗塞的金標準。當心肌細胞受損時，Troponin 會釋放到血液中，能比心電圖更早且準確地確認心肌損傷的程度，是急診處置的首選抽血項目。
Cardiac troponin is highly cardiac-specific and is the gold standard for diagnosing acute MI. When myocardial cells are damaged, troponin is released into the blood, allowing earlier and more accurate confirmation of myocardial injury than ECG—making it the first-line lab in emergency care.
✦ 台美臨床差異
美台臨床皆視肌鈣蛋白為首選，但在美國急診常有 protocol 授權護理師直接開立此檢驗單。