A nurse is collecting data for a client who experienced a myocardial infarction prior to a cardiac arrest. Which of the following laboratory tests will identify early injury to the cardiac muscle?
Creatine kinase-myocardial band (CK-MB) test
Troponin T test
Brain natriuretic peptide (BNP) test
Creatine kinase (CK) test
The Correct Answer is B
A. Creatine kinase-myocardial band (CK-MB) test: While CK-MB is also a marker of myocardial injury, it is less specific than troponin and can be elevated in other conditions, such as muscle injury.
B. Troponin T test. The Troponin T test is highly specific and sensitive for myocardial injury and is considered the gold standard for diagnosing a myocardial infarction. Troponin levels rise within hours of cardiac muscle injury and remain elevated for days, providing an early and reliable indicator of cardiac muscle damage.
C. Brain natriuretic peptide (BNP) test. BNP levels are used to assess heart failure and do not indicate acute cardiac muscle injury.
D. Creatine kinase (CK) test. CK measures overall muscle injury, not specific to cardiac muscle.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","C","E"]
Explanation
A. "This medication can make me have mood swings." Beta blockers can cause mood changes, such as depression or mood swings, as a side effect.
B. "I may have urinary incontinence while taking this medication." Urinary incontinence is not a common side effect of beta blockers.
C. "I should not drive while taking this new medication." Beta blockers can cause dizziness or fatigue, so clients should avoid driving until they know how the medication affects them.
D. "I may have frequent hiccups while taking this medication." Hiccups are not a common side effect of beta blockers.
E. "This new medication may decrease my sex drive." Beta blockers can sometimes cause decreased libido as a side effect.
Correct Answer is C
Explanation
A. 25 gtt/min: Calculating the correct rate reveals that this is not the correct answer.
B. 1500 gtt/min: This rate is too high; the calculation does not support this answer.
C. 50 gtt/min: To calculate: (100 mL / 120 min) × 30 gtt/mL = 50 gtt/min.
D. 83 gtt/min: This is too high based on the calculation.
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