which laboratory test would be the least effective in making the diagnosis of a myocardial infarction
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Nursing Elites

NCLEX-PN

Nclex Practice Questions 2024

1. Which laboratory test would be the least effective in diagnosing a myocardial infarction?

Correct answer: A

Rationale: AST, choice A, would be the least effective in diagnosing a myocardial infarction as it is not specific for this condition. Troponin, CK-MB, and myoglobin (choices B, C, and D) are more specific markers for myocardial infarction. Troponin is considered the gold standard due to its cardiac specificity. CK-MB is also specific to the heart, and its isoenzyme levels elevate post-heart damage. Myoglobin, although elevated in myocardial infarction, is not as specific as troponin and CK-MB and can also increase in conditions like burns and muscle trauma. Therefore, AST is the least effective choice for diagnosing a myocardial infarction.

2. Which information should be reported to the state Board of Nursing?

Correct answer: B

Rationale: The correct answer is 'The narcotic count has been incorrect on the unit for the past 3 days.' This information should be reported to the state Board of Nursing as it involves medication errors and potential drug diversion, which are serious issues that fall under the jurisdiction of the Board. Reporting medication discrepancies and errors in narcotic counts is crucial for patient safety and regulatory compliance. Choices A, C, and D involve different types of issues that are not within the direct purview of the Board of Nursing. Providing literature in multiple languages (Choice A), addressing billing practices (Choice C), and resolving staff performance issues (Choice D) should be handled internally or reported to the appropriate departments or authorities, such as the Joint Commission or the charge nurse.

3. Lidocaine is a medication frequently ordered for the client experiencing

Correct answer: B

Rationale: Lidocaine is used to treat ventricular tachycardia. This medication slowly exerts an antiarrhythmic effect by increasing the electrical stimulation threshold of the ventricles without depressing the force of ventricular contractions. It is not used for atrial arrhythmias; thus, answer A is incorrect. Answers C and D are incorrect because lidocaine does not slow the heart rate, so it is not used for heart block or bradycardia.

4. A client has been taking alprazolam (Xanax) for four years to manage anxiety. The client reports taking 0.5 mg four times a day. Which statement indicates that the client understands the nurse's teaching about discontinuing the medication?

Correct answer: C

Rationale: The correct answer is that the client should take three pills per day next week, then two pills for one week, and then one pill for one week. This statement indicates a gradual tapering schedule, which is crucial when discontinuing alprazolam (Xanax) to prevent withdrawal symptoms. Choice A is incorrect because alcohol should be avoided while tapering off benzodiazepines due to the increased risk of respiratory depression. Choice B is incorrect because abruptly stopping alprazolam can lead to withdrawal symptoms. Choice D is incorrect because while drowsiness can be a side effect of alprazolam, it is not the primary concern when discontinuing the medication; preventing withdrawal symptoms is the priority.

5. The physician has prescribed tranylcypromine sulfate (Parnate) 10mg bid. The nurse should teach the client to refrain from eating foods containing tyramine because it may cause:

Correct answer: A

Rationale: If the client eats foods high in tyramine, he might experience malignant hypertension. Tyramine is found in cheese, sour cream, Chianti wine, sherry, beer, pickled herring, liver, canned figs, raisins, bananas, avocados, chocolate, soy sauce, fava beans, and yeast. These episodes are treated with Regitine, an alpha-adrenergic blocking agent. Choices B, C, and D are unrelated to the question: Hyperthermia is excessive body temperature, melanoma is a type of skin cancer, and urinary retention is the inability to empty the bladder.

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