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Coronary artery bypass surgery for coronary artery disease


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  • A coronary artery is blocked
    Illustration of blockage in the coronary arteries

    Coronary artery bypass grafting (CABG) surgery reroutes blood around blocked arteries, increasing blood flow to the heart muscle tissue.

  • The sternum is cut
    Illustration of a vertical incision in the chest

    The surgeon makes a vertical incision in the skin and muscle in the middle of the chest and then cuts through the breastbone (sternum).

  • The heart is exposed
    Illustration of the surgical site exposed with a rib spreader

    The surgeon spreads the rib cage with a retractor to expose the heart and then cuts through the lining that protects the heart (pericardium).

  • Blood flow is rerouted
    Illustration of grafts that restore blood flow to the heart

    To reroute blood flow around the diseased blood vessel, surgeons typically use a portion of the saphenous vein in the leg or an internal mammary artery.

  • Oxygen-rich blood flows to heart muscle
    Illustration of normalized blood flow restored by bypass grafts

    Regardless of which type of blood vessel is used, oxygen-rich blood from the aorta is rerouted around the blocked section of the coronary artery to feed the heart muscle.


Last Updated: May 29, 2008
Medical Review:
Caroline S. Rhoads, MD - Internal Medicine

Robert A. Kloner, MD, PhD - Cardiology

Ruth Schneider, MPH, RD - Diet and Nutrition


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