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A coronary artery bypass graft (CABG) is an open-heart surgery. A part of a blood vessel from another part of the body is attached to a blocked artery of the heart. The attached blood vessel improves blood flow to an area of the heart.
Coronary Artery Bypass Surgery
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CABG can improve blood flow in arteries of the heart. Problems with blood flow are most often caused by atherosclerosis. This is a build up of fatty substance on the wall of the blood vessel. It builds overtime and decreases the amount of blood that can flow through to the heart muscle. Slowed blood flow can cause chest pain called angina, damage to heart, or a heart attack.
CABG may be done if there are severe blockages in arteries of the heart. It may be done as part of a treatment plan if other treatment has not worked. CABG may also be done as part of emergency care during or after a heart attack.
Problems from the procedure are rare, but all procedures have some risk. Your doctor will talk about possible problems, like:
Some factors that may increase the risk of complications include:
Earlier tests will be reviewed. They help guide treatment.
The care team will ask about regular medicine. Some medicine may need to be stopped for one week before surgery, unless it is an emergency. Before surgery:
General anesthesia will be given. You will be asleep and pain will be blocked.
There are 3 different types of CABG:
A piece of blood vessel will be taken from the chest wall or the leg. One end of the new vessel will be attached just above the blockage in the heart. The other end will be attached just below the blockage. In traditional CABG, the heart will then be allowed to restart. Electrical shocks may be needed to make sure the heart is beating as it should. The heart-lung machine will be disconnected.
Temporary tubes may be placed in the chest. It will help to drain any fluid from the chest. The breastbone will be wired together if needed. The chest will be closed with stitches or staples.
Recovery will take place in the intensive care unit. The heart and lungs will be closely monitored. Medicine for pain will be given through an IV. Oxygen may also be given. Pacing wires may also be attached. They can help to correct abnormal rhythms from the heart.
4 to 5 hours
Anesthesia prevents pain during surgery. There will be pain for a few weeks if the chest was open. Medicine and support tips will help manage pain during recovery.
5 to 7 days
Dressings will be removed in 1 to 2 days. Pacing wires and chest tubes will be removed after a few days. Movement and other steps will be encouraged to help prevent complications. Step may include:
It will be several weeks before you can return to all normal activity. A cardiac rehabilitation program may help to make changes to further improve heart health.
It is important for you to monitor your recovery after you leave the hospital. Alert your doctor to any problems right away. Call your doctor for:
If you think you have an emergency, call for emergency medical services right away.
American Heart Association
National Heart, Lung, and Blood Institute
Heart and Stroke Foundation of Canada
Coronary artery bypass graft (CABG) surgery. EBSCO DynaMed website. Available at:
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Accessed April 13, 2021.
Diodato M, Chedrawy EG. Coronary artery bypass graft surgery: the past, present, and future of myocardial revascularisation. Surg Res Pract. 2014;2014:726158.
Explore coronary artery bypass grafting. National Heart, Lung, and Blood Institute website. Available at: https://www.nhlbi.nih.gov/health/health-topics/topics/cabg. Accessed April 13, 2021.
Hillis LD, Smith PK, Anderson JL, et al. 2011 ACCF/AHA Guideline for Coronary Artery Bypass Graft Surgery: a report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines. Circulation. 2011 Dec 6;124(23):e652
Last reviewed November 2020 by
EBSCO Medical Review Board
Michael J. Fucci, DO, FACC
Last Updated: 12/20/2020