During ventricular fibrillation, progression may lead to which rhythm as it worsens?

• A. Ventricular tachycardia
• B. Pulseless electrical activity
• C. Ventricular fibrillation
• D. Asystole

Answer: (D)

Ventricular fibrillation creates chaotic, ineffective electrical activity where the ventricles quiver instead of pumping. If this rhythm isn’t interrupted by defibrillation and CPR, the electrical activity and perfusion collapse further, ultimately progressing to asystole—the flatline you see when there is essentially no organized electrical activity left. This end-stage, non- perfusing state is the reason asystole is described as the worsening progression from VF. While other patterns like ventricular tachycardia or pulseless electrical activity can appear in cardiac arrest, they are not the inevitable progression of untreated VF toward complete electrical cessation; the sequence most consistent with worsening VF is a drift toward asystole.