A client with atrial fibrillation is scheduled for an elective cardioversion.
The nurse prepares for the procedure by inserting two intravenous (IV) catheters and connecting the monitoring lead wires to the client.
Which action is most crucial for the nurse to take before initiating the cardioversion?
Activate the synchronization mode.
Choose a monitor lead with a tall R wave.
Administer the prescribed sedative.
Verify the prothrombin time (PT).
The Correct Answer is C
Choice A rationale
Activating the synchronization mode is important during cardioversion to avoid delivering a shock during the vulnerable period of cardiac repolarization, which could potentially cause a life-threatening arrhythmia. However, it is not the most crucial action.
Choice B rationale
Choosing a monitor lead with a tall R wave can help ensure that the cardioverter-defibrillator can sense the patient’s intrinsic cardiac activity. However, this is not the most crucial action.
Choice C rationale
Administering the prescribed sedative is the most crucial action before initiating cardioversion. Sedation is necessary to ensure patient comfort and cooperation during the procedure, as cardioversion can be painful.
Choice D rationale
Verifying the prothrombin time (PT) is important in patients receiving anticoagulation therapy, as atrial fibrillation increases the risk of thrombus formation. However, it is not the most crucial action before initiating cardioversion.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Administering the medication at 1000, 1600, 2200, and 0400 would not be the best schedule because it does not evenly distribute the doses throughout the day. This could lead to periods of subtherapeutic medication levels and periods of potential toxicity.
Choice B rationale
Administering the medication with meals and a bedtime snack is not the best schedule for this medication. While some medications need to be administered with food, there is no indication
that this medication needs to be. Furthermore, this schedule could lead to uneven distribution of the medication throughout the day.
Choice C rationale
Giving the medication in equally divided doses during waking hours is not the best schedule because it does not take into account the half-life of the medication or the patient’s sleep schedule. This could lead to subtherapeutic levels of the medication during the night.
Choice D rationale
Administering the medication at 0800, 1200, 1600, and 2000 is the best schedule for this medication. It evenly distributes the doses throughout the day, which can help maintain a therapeutic level of the medication and reduce the risk of toxicity.
Correct Answer is D
Explanation
Choice A rationale
Determining the presence of ST-elevations or non-ST-elevations on the electrocardiogram is an important step in diagnosing a myocardial infarction. However, this is typically performed by a healthcare provider or a trained technician, not a nurse.
Choice B rationale
While creating a calm and quiet environment can be beneficial for a client experiencing chest pain, it is not the immediate intervention that should be performed. The client’s symptoms suggest a possible cardiac event, which requires immediate medical intervention.
Choice C rationale
Verifying that troponin level assessments are scheduled every 3-6 hours for a series of three is important for diagnosing myocardial infarction. However, this is not the immediate intervention that should be performed. The client’s symptoms suggest a possible cardiac event, which requires immediate medical intervention.
Choice D rationale
Applying oxygen via nasal cannula and titrating to keep oxygen saturation above 93% is the correct intervention. This action helps to increase the oxygen supply to the myocardium, potentially decreasing the extent of myocardial damage and relieving chest pain.
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