Which rhythm does defibrillation aim to restore?

Defibrillation is a medical procedure aimed at restoring a normal heart rhythm, particularly in cases where the heart's electrical system has gone awry. When the heart is in a state of ventricular fibrillation, which is a critical condition where the heart is effectively quivering instead of pumping blood, defibrillation delivers a dose of electric current to restore a coordinated heartbeat. The goal is to reset the heart's electrical activity, allowing the natural sinus rhythm to take over and re-establish a stable and effective heartbeat.

While the other rhythms mentioned, such as ventricular fibrillation and atrial fibrillation, can be severe arrhythmias that require different management approaches, the primary purpose of defibrillation specifically targets the restoration of a normal heart rhythm that allows for efficient blood circulation. Hence, the answer that focuses on the aim of defibrillation aligns with the broader goal of achieving a functioning and stable rhythm in the heart.