The nurse is assessing a patient who is receiving metoprolol 2 days after an acute coronary syndrome (ACS), Which physiological action of metoprolol supports the desired or therapeutic response?
Increases contractility.
Increases preload.
Decreases afterload.
Decreases diastolic filing time.
The Correct Answer is C
A) Increases contractility: Metoprolol, a beta-blocker, actually decreases contractility. It reduces the force of contraction of the heart muscle, which can help reduce myocardial oxygen demand and improve outcomes after ACS. Increasing contractility would counteract the therapeutic goals of metoprolol in managing ACS.
B) Increases preload: Preload refers to the volume of blood in the ventricles at the end of diastole. Metoprolol does not increase preload; rather, it reduces myocardial workload and oxygen demand, which does not directly affect preload but rather the heart's performance overall.
C) Decreases afterload: Metoprolol reduces afterload indirectly by lowering blood pressure and decreasing heart rate, which helps reduce the workload on the heart. This reduction in afterload supports the therapeutic goals of metoprolol in managing ACS by decreasing the heart's work and improving cardiac efficiency.
D) Decreases diastolic filling time: Metoprolol slows the heart rate, which can lead to increased diastolic filling time, not a decrease. Increased filling time can be beneficial as it allows the heart more time to fill with blood between beats, thereby improving cardiac output.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A) Administer an oral analgesic and evaluate its effectiveness before applying the new patch: This action is unnecessary because the client reports no pain. Administering an oral analgesic would not be appropriate when the client denies pain and the previous fentanyl patch is intact.
B) Apply the new patch in a different location after removing the original patch: This is the correct action. Fentanyl patches should be replaced with new ones in a different location to prevent overdosing and ensure proper absorption. The old patch should be removed to avoid accumulation of excess medication.
C) Remove the patch and consult with the healthcare provider about the client's pain resolution: There is no need to consult the healthcare provider or remove the patch if the client denies pain and the patch is intact. The issue is with replacing the patch rather than evaluating pain.
D) Place the patch on the client's shoulder and leave both patches in place for 12 hours: This is unsafe. Applying a new patch without removing the old one can lead to overdose due to excessive fentanyl. The old patch must be removed before placing a new one.
Correct Answer is D
Explanation
A. Administer both prescribed medications as scheduled: Given that the client's total calcium level is already elevated (14 mg/dL), administering additional calcium carbonate could exacerbate hypercalcemia. Calcitriol, a form of vitamin D, can also increase calcium levels, so administering it without addressing the high calcium level could worsen the condition.
B. Hold the calcium carbonate, but administer the calcitriol as scheduled: This option is not appropriate because calcitriol can further increase calcium levels, potentially worsening hypercalcemia. Both medications should be reviewed, and their administration should be adjusted according to the client's current calcium status.
C. Hold the calcitriol, but administer the calcium carbonate as scheduled: Holding calcitriol alone would not address the potential for further increasing calcium levels. Calcium carbonate should also be withheld since the client is already hypercalcemic.
D. Hold both medications until contacting the healthcare provider: This is the most appropriate action. The client's elevated calcium level indicates hypercalcemia, which requires careful management. The healthcare provider should be contacted to assess the situation and determine the appropriate course of action to avoid worsening hypercalcemia.
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