NREMT Paramedic Cognitive ExamCardiology & ResuscitationEasy
A 45-year-old male with no known medical history suddenly collapses while exercising. CPR is immediately initiated by bystanders. Upon your arrival, the cardiac monitor shows ventricular fibrillation. What is the most critical intervention to perform next?
- AAdminister epinephrine 1 mg IV.
- BEstablish IV access.
- CAdminister amiodarone 300 mg IV.
- DDefibrillate immediately.
Show answer & explanationAnswer & explanation
Correct answer: D. Defibrillate immediately.
For a patient in ventricular fibrillation, immediate defibrillation is the most critical intervention to convert the rhythm and improve survival. Early defibrillation is paramount, and it should not be delayed by other interventions like drug administration or IV access if a defibrillator is immediately available.
Why the other options are wrong
- A. Epinephrine is given after the first and subsequent defibrillation attempts, not before the initial shock.
- B. While important, establishing IV access should not delay the initial defibrillation for VF.
- C. Amiodarone is an antiarrhythmic given after initial defibrillation and epinephrine, if VF persists.
Ventricular Fibrillation (VF) Management
Ventricular fibrillation is a chaotic electrical activity in the ventricles, leading to ineffective pumping and cardiac arrest. It is a shockable rhythm.
- Characterized by irregular, chaotic waveforms on ECG with no discernible QRS complexes.
- Patient is pulseless and unresponsive.
- Immediate high-quality CPR and rapid defibrillation are critical.
- Medications (epinephrine, amiodarone) are adjuncts to defibrillation.
Memory trick: Shock the VF, Save a Life Fast!