While attending to a patient in cardiac arrest, effective and high-quality chest compressions are being administered. The patient has been intubated, and an IV has been established in the right antecubital space.

After the initial uncoordinated electrical activity rhythm without identifiable QRS complexes or P waves, a shock is administered, followed by 2 minutes of CPR. During the subsequent rhythm assessment, the monitor displays the following rhythm (as depicted below). If the patient continues to remain unresponsive and a palpable pulse is detected at a rate of 180/min, what should be the next medication and dosage administered?

What is the subsequent drug and dose to be provided if the patient remains unconscious and maintains a palpable pulse at a rate of 180/min?

Question

TheoryPractice · Accepted Answer

Adenosine 6 mg IV. Adenosine is the appropriate medication to administer next because the patient's heart rhythm is displaying a wide complex tachycardia, which suggests a possible supraventricular tachycardia or ventricular tachycardia. Adenosine is a medication that can help diagnose and treat supraventricular tachycardias by temporarily stopping the heart and allowing it to restart in a normal rhythm. The initial dose of adenosine is 6 mg, followed by a rapid flush of normal saline. If there is no response to the initial dose, a second dose of 12 mg may be given.

Option A (Atropine 0.5 mg IV) is the wrong answer because atropine is typically used for symptomatic bradycardia, not for unstable tachycardias. Atropine works by blocking the action of the vagus nerve and increasing heart rate, which can be beneficial in cases of bradycardia.

Option C (Epinephrine 1 mg IV) is also an incorrect answer because epinephrine is indicated for cardiac arrest with pulselessness, not for managing unstable tachycardias. Epinephrine is a vasoconstrictor that helps increase blood flow to vital organs during cardiopulmonary resuscitation.

Option D (Amiodarone 300 mg IV) is not the appropriate choice in this scenario either. Amiodarone is commonly used for ventricular fibrillation and pulseless ventricular tachycardia, not for managing stable tachycardias with a pulse. It works by stabilizing the electrical activity of the heart and controlling abnormal rhythms.

In summary, the appropriate medication and dosage to administer next for a patient with an unconscious state and a pulse rate of 180 beats per minute, displaying the described heart rhythm, is B) Adenosine 6 mg IV.

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