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B. Total Lactate Dehydrogenase (LDH) was historically used but is not specific for MI and has been replaced by troponin testing.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. 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B. Total Lactate Dehydrogenase (LDH) was historically used but is not specific for MI and has been replaced by troponin testing.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.
Correct Answer is D
Explanation
A. Taking 4 nitroglycerin tablets is incorrect. The maximum dose is 3 tablets, taken 5 minutes apart. If chest pain persists after the third dose, the client should seek emergency help.
B. Calling 911 after only one dose is incorrect. The correct protocol is to take up to three doses before seeking emergency assistance unless symptoms worsen rapidly.
C. Calling 911 immediately before taking nitroglycerin is incorrect. The client should attempt to relieve the chest pain with nitroglycerin before calling for emergency help.
D. Calling 911 if pain persists after taking 3 nitroglycerin tablets 5 minutes apart is correct. Persistent chest pain despite nitroglycerin use suggests a possible myocardial infarction (MI), requiring immediate medical intervention.
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