Coronary Artery Bypass Graft Surgery (CABG)

What is coronary artery bypass graft surgery?

Coronary artery bypass graft surgery (CABG) is surgery to improve blood flow when one or more of the arteries that supply blood to the heart muscle (coronary arteries) are narrowed or blocked. A blood vessel from another part of your body, called a graft, will be used to make a new path for blood to flow through. One end of the graft will be stitched above the blockage in the heart artery. The other end will be stitched below the blockage. This will allow blood to bypass the blockage and get to where it is needed to provide oxygen-rich blood to the heart muscle.

The most common graft is done using an internal mammary artery, a blood vessel found in the chest wall. This artery is close to the bypass site and has a good blood supply, so it only needs to be sewn to the blocked coronary artery below the blockage. Other graft vessels include the radial artery in the arm or the saphenous vein in the leg.

How is a coronary artery bypass graft done?

Before the procedure:

• Your healthcare provider will ask you to sign a consent form for CABG. The consent form will state the reason you are having the CABG, what happens during the CABG, and what you may expect afterward.
• Tell your healthcare provider if you have any food, medicine, or other allergies such as latex.
• Tell your provider if you have had kidney problems or an allergy to chemicals, such as contrast dye.
• Tell your healthcare provider if you are taking any medicines, including nonprescription drugs, herbal remedies, or recreational or illegal drugs.
• You will have a small tube (IV catheter) inserted into a vein in your hand or arm. This will allow medicine to be given directly into your blood and to give you fluids, if needed.

During the procedure:

• You may be given a sedative through your IV to help you to relax.
• You will be given medicine called anesthesia to keep you from feeling pain. General anesthesia relaxes your muscles and puts you into a deep sleep. It also keeps you from remembering the operation. While you are asleep you will have a tube in your throat to help you breath and to make sure you are getting enough oxygen. The tube may be removed before you wake up after the surgery.
• You may have a small tube (catheter) placed into your bladder to drain and measure urine.
• Your surgeon will make a cut in your chest and separate your sternum, or breastbone.
• A heart-lung machine will take over the work of moving oxygen-rich blood to your body during the operation.
• For the graft:
  • If the graft blood vessel is an internal mammary artery from the chest, your provider will cut the lower end of the artery and sew it into the coronary artery below the blockage.
  • If the graft blood vessel is the radial artery or saphenous vein:
    • Your provider will make a cut in the skin of the arm or leg and remove a part of the vessel that will be used as the graft. The cut will be closed with stitches.
    • The graft blood vessel ends are sewn into the areas above and below the blockage.
• The cut in your chest will be closed by wiring together your sternum or breastbone and then closing the skin with stitches.
• Temporary tubes may be left in place to drain blood and fluid.

After the procedure:

• You may be in the intensive care unit for close monitoring. Your breathing tube may stay in place after surgery until you are able to breathe well on your own. When you no longer need close monitoring, you will be moved to a regular hospital room.
• You will be checked often by nursing staff.
• There will be a dressing on your chest where the cut was made and where there are any drainage tubes. The dressing will be checked and changed by your provider or the nursing staff as needed. If drainage tubes were left in place, they will be checked and emptied regularly.
• Your provider may prescribe medicine to:
  • Treat pain
  • Treat or prevent an infection
  • Treat or prevent side effects, such as nausea or constipation, from other treatments
  • Relax and widen blood vessels and allow blood to flow through them easier
  • Help prevent blood clots
  • Slow your heart rate and reduce the workload of your heart
  • Control cholesterol levels
  • Reduce fluid build-up and swelling in the body
• Your provider may recommend other types of therapy to help relieve pain, other symptoms, or side effects of treatment.
• Your blood oxygen level will be monitored by a sensor that is attached to your finger or earlobe.
• A cardiac (heart) monitor will be used to keep track of your heartbeat.

What can I do to help?

• You will need to tell your healthcare team if you have new or worsening:
  • Chest pain or pressure, squeezing, or fullness in the center of your chest that lasts more than a few minutes, or goes away and comes back (may feel like indigestion or heartburn)
  • Pain or discomfort in one or both arms or shoulders, or in your back, neck, jaw, or stomach
  • Trouble breathing
  • Breaking out in a cold sweat for no known reason
  • Along with the previous symptoms, feeling very tired, faint, or sick to your stomach
  • Feeling like your heart is beating too fast, too slow, or skipping beats
  • Unusual bruising or bleeding
  • Increased pain at the site of surgery
  • Swelling of your legs, ankles, or feet
  • Redness, swelling, pain, warmth, or drainage from your surgical wound
  • Fever, chills, or muscle aches.
• You (or your family) may notice some confusion or forgetfulness after surgery. Talk to your healthcare provider about this.
• Ask questions about any medicine, treatment, or information that you do not understand.

How long will I be in the hospital?

How long you stay in the hospital depends on many things, such as your general health, why you are in the hospital, the treatment you need, and how well you recover. Talk with your provider about how long your stay may be.

You may need to go to a rehab facility to continue your cardiac rehab program before going home.