The nurse has received the laboratory results for a patient who developed chest pain 4 hours ago and may be having a myocardial infarction. Which laboratory test result should be most helpful in indicating myocardial infarction?
Creatine kinase-MB (CK-MB)
B-type natriuretic peptide (BNP)
Myoglobin
Troponin
The Correct Answer is D
A. CK-MB is a cardiac enzyme that rises in response to myocardial injury, but it is less specific and takes longer to rise than troponin.
B. BNP is associated with heart failure, not myocardial infarction.
C. Myoglobin is an early marker but is non-specific, as it rises with any muscle damage.
D. Troponin is the most specific and sensitive biomarker for myocardial infarction. It rises within 3-4 hours after myocardial injury and remains elevated for days, making it the most useful test for confirming an MI.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. This response may make the spouse feel pressured by implying that religion should not be a concern, which may not be respectful of the spouse's beliefs.
B. This statement is coercive, focusing on the shortage of organs rather than on the spouse's feelings and the wishes of the deceased.
C. Suggesting that donating organs will make the spouse feel better can be seen as manipulative and may not truly address the spouse's confusion or emotions.
D. Asking what the spouse thinks the deceased would have wanted is appropriate, as it centers on the values and wishes of the deceased, which can guide the spouse in making an informed decision.
Correct Answer is A
Explanation
A. Sudden weight gain can indicate fluid retention, a common early sign of heart failure exacerbation. Prompt reporting allows for early intervention.
B. Nitroglycerin is used to treat chest pain, not specifically to prevent heart failure exacerbations.
C. Assessment of the apical pulse is important, but monitoring weight is more directly related to managing heart failure.
D. Compliance with diuretic therapy is important, but recognizing early signs of fluid retention, such as rapid weight gain, is crucial for preventing exacerbations.
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