Coronary artery bypass graft surgery, is recommended for patients when the coronary arteries become blocked or damaged with calcium and fatty deposits , and when the blockage is too severe to be managed with medication or other treatment. In this surgery,a surgeon removes blood vessels from another part of your body like your chest, leg, abdomen or arm to go around, or bypass, a blocked artery. After this, more blood and oxygen can flow to your heart again.
Some medical conditions such as diabetes, emphysema, kidney disease, and Peripheral Artery Disease can complicate surgery.The surgery generally takes 3 to 6 hours. The risks differ from person to person, based on the severity of heart disease, type of operation, age, and the current health state.Some risks are

2.Wound Infection
4.Memory loss
5.Pulmonary problems
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You can expect to stay in the hospital for a week after having a bypass surgery, including at least 1 or 2 days in the Intensive Care Unit (ICU).If you have an office job, you can usually go back to work in 4 to 6 weeks. Side effects will disappear with 4 to 6 weeks after operation.You will visit doctor several times after surgery for periodic checkups to know your progress.Taking medicine as prescribed is also an important care after surgery.Your doctor may prescribe medicines to manage pain during recovery, lower cholesterol and blood pressure, reduce the risk of blood clots forming, manage diabetes or treat depression.