Which of the following is the best corrective measure for ventricular fibrillation?

The best corrective measure for ventricular fibrillation is defibrillation, as it is the only treatment that can restore a normal heart rhythm in this critical condition. Ventricular fibrillation is a life-threatening arrhythmia where the heart's electrical activity becomes chaotic, preventing effective pumping.

Defibrillation delivers an electrical shock to the heart, which can help reset the heart's electrical system and allow for re-establishment of a normal rhythm. The effectiveness of defibrillation is highest when it is administered as quickly as possible after the onset of ventricular fibrillation. This is why in advanced cardiovascular life support (ACLS) protocols, prompt recognition of cardiac arrest and rapid access to a defibrillator are emphasized.

While recognition and early access, early CPR, and early advanced care are all important components of a comprehensive approach to cardiac arrest, they serve supportive roles in the chain of survival. Early CPR can help maintain blood flow to vital organs, and early advanced care can provide medications and further treatment, but it is the defibrillation that is specifically aimed at immediately correcting the arrhythmia of ventricular fibrillation.