Cardioversion is a medical procedure done to restore a normal heart rhythm for people who have certain types of abnormal heartbeats (arrhythmias). It is most often done by sending electric shocks to your heart through electrodes placed on your chest. Occasionally, your doctor may perform cardioversion using only medications to restore your heart’s rhythm. Cardioversion is usually a scheduled procedure which for your comfort and safety is performed in a hospital. You will be sedated and monitored during the procedure so that you don’t feel or remember it, and in most cases you are able to go home with another adult later the same day (“outpatient”).