Coronary bypass surgery

Coronary bypass surgery is a procedure that restores blood flow to your heart muscle by diverting the flow of blood around a section of a blocked artery in your heart. Coronary bypass surgery uses a healthy blood vessel taken from your leg, arm, chest or abdomen and connects it to the other arteries in your heart so that blood is bypassed around the diseased or blocked area. After a coronary bypass surgery, blood flow to your heart is improved. Coronary bypass surgery is just one option to treat heart disease.

Coronary bypass surgery improves symptoms, such as chest pain and shortness of breath due to poor blood flow to the heart. In some situations, coronary bypass surgery may improve your heart function and reduce your risk of dying of heart disease.


Why it's done Risks How you prepare What you can expect Results

You and your doctor can consider whether coronary bypass surgery or another artery-opening procedure, such as angioplasty or stenting, is right for you.

Coronary bypass surgery is an option if:

  • You have severe chest pain caused by narrowing of several of the arteries that supply your heart muscle, leaving the muscle short of blood during even light exercise or at rest. Sometimes angioplasty and stenting will help, but for some types of blockages, coronary bypass surgery may be the best option.
  • You have more than one diseased coronary artery and the heart's main pumping chamber — the left ventricle — isn't functioning well.
  • Your left main coronary artery is severely narrowed or blocked. This artery supplies most of the blood to the left ventricle.
  • You have an artery blockage for which angioplasty isn't appropriate, you've had a previous angioplasty or stent placement that hasn't been successful, or you've had stent placement, but the artery has narrowed again (restenosis).

Coronary bypass surgery may also be performed in emergency situations, such as a heart attack, if your doctor sees that you're not responding to other treatments.

Coronary bypass surgery doesn't cure the underlying heart disease that caused blockages in the first place. This disease is referred to as atherosclerosis or coronary artery disease. Even if you have coronary bypass surgery, lifestyle changes are still a necessary part of treatment after surgery. Medications are routine after coronary bypass surgery to lower your blood cholesterol, reduce the risk of developing a blood clot and help your heart function as well as possible.

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