A client came into the emergency room with a possible myocardial infarction. The provider orders a series of blood tests to be drawn, which lab should the nurse anticipate will be drawn?
Brain Natriuretic Peptide (BNP)
Total Lactate Dehydrogenase (LDH)
Troponin
Creatinine
The Correct Answer is C
A. Brain Natriuretic Peptide (BNP) is a marker for heart failure, not the primary diagnostic test for myocardial infarction (MI).
B. Total Lactate Dehydrogenase (LDH) was historically used but is not specific for MI and has been replaced by troponin testing.
C. Troponin is correct. Cardiac-specific troponins (Troponin I and Troponin T) are the gold standard for detecting myocardial injury. Elevated levels indicate myocardial damage and are crucial for diagnosing MI.
D. Creatinine is important for assessing kidney function but is not a marker for myocardial infarction.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Morphine may be given to relieve pain and anxiety but is not the first priority. Oxygenation must be addressed first.
B. Initiating cardiac monitoring is important but does not take priority over oxygen therapy. Hypoxia from a PE can cause life-threatening complications.
C. Administering oxygen therapy is correct. A PE impairs oxygenation, leading to hypoxia. Immediate oxygen administration helps improve oxygen delivery to vital organs.
D. Starting an IV infusion is necessary to maintain hemodynamic stability but is not the priority over oxygenation.
Correct Answer is C
Explanation
A. A pulmonary function test is used to assess lung diseases like COPD or asthma. It is not the primary diagnostic test for fluid overload and heart failure.
B. Alpha-1 antitrypsin deficiency is associated with early-onset COPD, but it does not relate to symptoms of fluid retention and heart failure as described in the question.
C. Brain Natriuretic Peptide (BNP) is correct. BNP is released when the ventricles stretch due to fluid overload, making it a key diagnostic marker for heart failure. Elevated BNP levels indicate increased cardiac filling pressures and volume overload, which match the client’s symptoms.
D. A Doppler ultrasound is useful for detecting deep vein thrombosis (DVT) or vascular issues, but it does not assess systemic fluid retention and heart failure.
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