In the context of cardiac arrest, what does early defibrillation aim to restore?

Early defibrillation aims to restore a normal heart rhythm. During a cardiac arrest, particularly in cases of ventricular fibrillation or pulseless ventricular tachycardia, the heart can quiver ineffectively instead of pumping blood. Defibrillation delivers a controlled electrical shock to the heart, attempting to reset its electrical activity and restore a coordinated rhythm. This is critical because a normal heart rhythm is necessary for effective circulation and the delivery of oxygenated blood to vital organs.

While restoring consciousness, pulmonary function, or blood pressure could be outcomes of successful defibrillation and resuscitation efforts, the primary objective of early defibrillation is to address the underlying rhythm disturbance. Only by achieving a normal heart rhythm can the heart start functioning effectively again, leading to improved organ perfusion and potential recovery of consciousness and other bodily functions.