Mr. N. complains of fatigue, shortness of breath, and tachycardia. The nurse suspects that he may have a deficiency of:
1. Potassium.
2. Zinc.
3. Sodium.
4. Iron.
4
Rationale: Iron deficiency results in anemia, and can cause symptoms such as shortness of breath, fatigue, and tachycardia. Symptoms of potassium deficiency include cardiac arrhythmias and muscle cramps. Zinc deficiency is more likely to include symptoms of rash or hair loss. Sodium excess can cause shortness of breath due to a fluid overload but does not cause tachycardia or fatigue. Sodium deficiency is uncommon.
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