A nurse in the emergency room is caring for a client who presents with manifestations that indicate a myocardial infarction. Which of the following prescriptions should the nurse take first?

The correct answer is: C. Continue the rate at 125 mL/hr.
Choice A: Slow the rate to 50 mL/hr
Slowing the IV fluid rate to 50 mL/hr is not appropriate for a patient with a head injury. Adequate fluid management is crucial to maintain cerebral perfusion pressure and prevent secondary brain injury. Reducing the rate to 50 mL/hr could lead to hypovolemia, which might decrease cerebral perfusion and worsen the patient’s condition.
Choice B: Slow the rate to 20 mL/hr
Slowing the IV fluid rate to 20 mL/hr is even less appropriate. Such a low rate would likely result in significant hypovolemia, severely compromising cerebral perfusion pressure. This could exacerbate the patient’s head injury by reducing the blood flow to the brain, leading to further damage.
Choice C: Continue the rate at 125 mL/hr
Continuing the rate at 125 mL/hr is appropriate. This rate helps maintain euvolemia, which is essential for ensuring adequate cerebral perfusion pressure in patients with head injuries. Maintaining a stable fluid rate helps prevent both hypovolemia and hypervolemia, both of which can negatively impact intracranial pressure and cerebral perfusion.
Choice D: Increase the rate to 250 mL/hr
Increasing the IV fluid rate to 250 mL/hr is not recommended. Overhydration can lead to increased intracranial pressure, which can be detrimental to a patient with a head injury. Excessive fluid administration can cause cerebral edema, worsening the patient’s condition.

The correct answer is: A. Elective cardioversion

Choice A reason:

Elective cardioversion is a medical procedure that is used to restore a normal heart rhythm in patients experiencing certain types of arrhythmias, including ventricular tachycardia (VT), when they are stable. It involves the delivery of a controlled electric shock to the heart, which is synchronized with the heart's electrical activity to convert the abnormal rhythm back to a normal sinus rhythm. This procedure is typically performed when VT is not causing hemodynamic instability and the patient is not in immediate danger.

Choice B reason:

Defibrillation is an emergency treatment for life-threatening cardiac arrhythmias, particularly ventricular fibrillation (VF) or pulseless ventricular tachycardia. It involves delivering a high-energy electric shock to the heart unsynchronized to the heart's electrical cycle, aiming to reset the heart's electrical state and allow it to reestablish an effective rhythm. In the scenario provided, where the patient is experiencing VT but not VF, defibrillation would not be the first line of action unless the VT deteriorates into VF or the patient becomes pulseless.

Choice C reason:

CPR, or cardiopulmonary resuscitation, is a lifesaving technique useful in many emergencies, including heart attack or near drowning, in which someone's breathing or heartbeat has stopped. In the case of VT, if the patient is conscious and has a pulse, CPR is not indicated. CPR would only be necessary if the patient's heart stops beating (cardiac arrest) as a result of the VT.

Choice D reason:

Radiofrequency catheter ablation is a procedure used to treat some types of arrhythmias, including VT, by destroying the area of heart tissue that is causing the abnormal heart rhythm. This treatment is generally considered when medication is ineffective or not tolerated, or in recurrent VT. It is not typically the first line of treatment in an acute setting where the patient is stable and experiencing VT.