A DC cardioversion uses an electric shock to restore a normal heartbeat in someone with an irregular or abnormal heartbeat. This procedure is performed under general anesthesia in a hospital.

During the procedure, small pads are placed on the chest of the patient, and an electric shock is delivered to the heart to reset the heart rhythm. This shock is delivered through the pads, which act as electrodes, and is timed to coincide with a specific point in the heart's electrical cycle to ensure that the heart returns to a normal rhythm.

After the procedure, the patient is monitored to ensure that their heart rhythm remains stable. They may be prescribed medication or other treatments to help maintain a normal heartbeat and reduce the risk of future arrhythmias.