An adult client is being admitted to the coronary care unit with a possible myocardial infarction (MI). The client reports feeling like they are going to "pass out." The cardiac monitor displays the rhythm shown. The client's respiratory rate is 12 to 16 breaths/minute and blood pressure is 78/52 mm Hg. The nurse auscultates clear breath sounds bilaterally and the skin is pale and diaphoretic. After administering oxygen, which action should the nurse prepare to perform?

Assist the client to perform vagal maneuver or bear down.
Give an anticholinergic medication.
Administer a sedative and cardiovert the client.
Give a beta blocker medication.
The Correct Answer is C
Rationale:
A. Assist the client to perform vagal maneuver or bear down: The ECG shows supraventricular tachycardia (SVT) with a very rapid, regular rhythm. While vagal maneuvers may help slow the rate in stable clients, this client’s hypotension (78/52 mm Hg) and presyncope indicate instability.
B. Give an anticholinergic medication: Anticholinergic agents like atropine are used for bradyarrhythmias, not for tachycardia. Administering such a drug would further increase the heart rate and worsen myocardial oxygen demand in this client with suspected myocardial infarction.
C. Administer a sedative and cardiovert the client: The rhythm and symptoms indicate unstable supraventricular tachycardia. Synchronized cardioversion is the immediate treatment for unstable tachyarrhythmias with a pulse to restore sinus rhythm and improve perfusion. Sedation is given beforehand if the client is conscious.
D. Give a beta blocker medication: Beta blockers are appropriate for stable tachyarrhythmias but can dangerously lower blood pressure in an unstable patient. The client’s hypotension and near-syncope require electrical rather than pharmacologic intervention.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Rationale:
A. Blood pressure measurement of 122/84 mm Hg and a heart rate of 88 beats/minute: These vital signs are within acceptable limits and do not indicate an acute complication following a cerebral angiogram. No immediate intervention is required for these values.
B. No urinary output measured since the procedure: While monitoring urine output is important, a two-hour gap post-procedure may not yet indicate a critical problem. The nurse should continue to monitor and assess, but this is not the most urgent finding.
C. Diminished volume of right dorsalis pedis pulse: A weak or absent peripheral pulse following femoral artery catheterization may indicate arterial obstruction, thrombus, or compromised distal perfusion. Immediate intervention is required to restore circulation and prevent tissue ischemia.
D. Client reports feeling hot during the procedure and cold afterward: These sensations may reflect normal physiological responses to contrast media or procedural stress. While worth noting, they do not require urgent intervention compared to compromised limb perfusion.
Correct Answer is A
Explanation
Rationale:
A. Transcutaneous pacing: The ECG rhythm demonstrates a third-degree (complete) heart block. This results in severe bradycardia and hypotension (80/50 mm Hg), placing the client at risk for syncope and cardiac arrest. Transcutaneous pacing is the immediate intervention to maintain cardiac output until a permanent pacemaker can be placed.
B. Mechanical ventilation: Although hypotension and bradycardia can lead to hypoxia, the client’s issue is primarily electrical conduction failure, not respiratory compromise. Ventilatory support would not correct the underlying cause of hemodynamic instability.
C. Chest tube insertion: Chest tube insertion is indicated for pneumothorax or hemothorax, not cardiac conduction abnormalities. There is no evidence of respiratory distress or pleural injury requiring this intervention.
D. Synchronized cardioversion: Cardioversion is used for tachydysrhythmias such as atrial fibrillation or supraventricular tachycardia. It is contraindicated in complete heart block, where electrical pacing not shock is required to restore effective cardiac rhythm and perfusion
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