Sometimes electrical shock is required to restore a normal heart rhythm in patients with atrial fibrillation (AFib). During a cardioversion, your physician will deliver a brief electrical shock to your heart, causing all activity to pause, giving your heart a chance to "reset" and let your normal heart rhythm take over. You will have an IV in your arm and will be connected to a heart and blood pressure monitor. You will receive sedation through the IV and most likely will not remember anything about the procedure. After the sedation wears off and you are more awake, you should be able to go home later that day.