Difficulty: Medium
Average Score: 74%
Simulated
A client seen in the clinic with shortness of breath and fatigue is being evaluated for a possible diagnosis of heart failure. Which laboratory result will be the most useful for diagnosing heart failure?
Correct answer
A
Rationale
BNP (A) is the most specific marker for heart failure, elevated due to cardiac pressure and volume overload. Troponin I (B) indicates myocardial infarction. BUN (C) may be elevated in heart failure but is less specific. Platelet levels (D) are unrelated to heart failure diagnosis.