護理師正在照顧一位服用毛地黃（digoxin）和利尿劑的心臟衰竭病人。下列哪項潛在不良反應需要護理師立即評估？
A nurse is caring for a client with heart failure who is prescribed digoxin and a diuretic. Which potential adverse effect requires immediate nursing assessment?
- ANausea and vomiting噁心與嘔吐
- BBradycardia✓ 正解心搏過緩
- CDizziness頭暈
- DVisual disturbances視覺障礙
服用毛地黃（Digoxin）與利尿劑的病人，利尿劑可能導致低血鉀，而低血鉀會顯著增加毛地黃的毒性作用。毛地黃中毒的早期徵兆包括胃腸道症狀（噁心、嘔吐）與神經症狀（視覺改變），但心搏過緩（Bradycardia）是心臟毒性最直接且危險的指標。護理師需在給藥前監測心跳，並觀察有無心律不整，若心跳低於 60 下，則必須暫停給藥，這對預防心臟驟停至關重要。
For a client taking digoxin together with a diuretic, the diuretic may induce hypokalemia, which significantly increases digoxin toxicity. Early signs of digoxin toxicity include gastrointestinal symptoms (nausea, vomiting) and neurologic symptoms (visual disturbances), but bradycardia is the most direct and dangerous indicator of cardiac toxicity. The nurse should monitor the heart rate before administration; if the heart rate is below 60 bpm, the medication must be withheld, which is critical for preventing cardiac arrest.