After heart surgery, patients are typically kept asleep for a period of time in intensive care for observation. The length of time is dependent on the patient's underlying heart condition, the patient's general health, and a number of other factors.
Typically you will awaken between 2–6 hours after completion of surgery. Occasionally, it may be significantly longer.
During this time, you will be on a ventilator (breathing machine). As you awaken, you will be weaned from the breathing machine, and the endotracheal tube (breathing tube) will be removed.
Your anesthesiologist and surgeon will be able to give you more specific information.