A patient with ventricular fibrillation and is going to shock. Which medication will be expected to prescribe… - SGPGI Nursing Officer-2023

SGPGI Nursing Officer-2023

Pharmacology

Easy

Appeared in: SGPGI Nursing Officer-2023

Explanation

Epinephrine is the first-line vasopressor medication used in the management of ventricular fibrillation (VF) and pulseless ventricular tachycardia (pVT) according to Advanced Cardiac Life Support (ACLS) guidelines.
Its primary action in cardiac arrest is vasoconstriction, which increases systemic vascular resistance, thereby improving coronary and cerebral perfusion pressure during cardiopulmonary resuscitation (CPR).
The standard ACLS protocol calls for the administration of 1 mg of epinephrine IV/IO after the second defibrillation shock, with repeated doses every 3 to 5 minutes for the duration of the arrest.
The goal of administering epinephrine is to increase the effectiveness of CPR and defibrillation to achieve Return of Spontaneous Circulation (ROSC).

Option A: Atropine is an anticholinergic agent used to treat symptomatic bradycardia (abnormally slow heart rate). It has no therapeutic role in the management of ventricular fibrillation, which is a tachyarrhythmia.
Option C: Amiodarone is an antiarrhythmic drug, but it is considered a second-line agent in the VF algorithm. It is only administered after the patient has failed to respond to initial shocks and at least one dose of epinephrine.
Option D: Vasopressin is no longer recommended in the ACLS cardiac arrest algorithm. Previous guidelines allowed it as an alternative to the first or second dose of epinephrine, but this has been removed based on evidence showing no benefit over epinephrine.

Clinical Relevance

Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing Pharmacological management of ventricular fibrillation (VF) during cardiac arrest in acute care settings.
During a code blue, the nurse's role is critical. They must anticipate the need for epinephrine after the second shock in a patient with VF/pVT and have it prepared for immediate administration.
Ensuring patent IV or IO access is a top nursing priority, as timely drug delivery is essential for the effectiveness of ACLS interventions.
A key nursing responsibility is accurate documentation of the time of each medication administration and shock delivery to maintain the correct intervals and guide the resuscitation team.

How to Approach the Question

First, identify the patient's condition from the question stem: 'ventricular fibrillation' (VF).
Recognize that VF is a life-threatening cardiac arrest rhythm that requires immediate intervention.
Recall the Advanced Cardiac Life Support (ACLS) algorithm for 'shockable' rhythms (VF and pulseless VT).
The algorithm prioritizes high-quality CPR and early defibrillation ('shock').
Think through the sequence of medication administration within this algorithm. The first drug to be given is a vasopressor to improve perfusion during CPR.
Evaluate the options: Epinephrine is the primary vasopressor in the ACLS algorithm. Amiodarone is an antiarrhythmic for refractory VF. Atropine is for bradycardia. Vasopressin is no longer recommended.

Concept Tested & Keywords

Concept Tested: Pharmacological management of ventricular fibrillation (VF) during cardiac arrest.
Stem keywords: ventricular fibrillation, shock, medication
Lead-in keywords: will be expected to prescribe

QzYWZk3qG0NjiBVpyQD1Gf

E6 Medicine Harrison 22e Part 2 pp. 240-242, 241-243