Understanding this service
Coronary artery bypass grafting (CABG) creates a new pathway for oxygen-rich blood to reach the heart muscle. A healthy vessel from the chest, arm or leg is connected beyond a coronary blockage; the blockage itself is not removed. One or more grafts may be used according to the number and pattern of affected arteries.
The source page describes both on-pump surgery, which uses a heart-lung machine, and off-pump surgery performed on the beating heart. The choice between medicines, angioplasty and bypass surgery depends on coronary anatomy, symptoms, heart function, prior treatment, other health conditions and discussion with the cardiac team.
When is it recommended?
- Severe coronary narrowing that significantly restricts blood flow to the heart
- Disease affecting more than one important coronary artery
- Coronary anatomy that is not well suited to angioplasty or stenting
- Persistent or recurrent disease after a previous angioplasty or stent
- A clinical situation in which the heart team considers bypass the most appropriate revascularisation strategy
Purpose and potential benefits
- Creates a new route for blood to reach heart muscle beyond a blockage
- Can treat several important coronary narrowings during one operation
- May reduce angina and improve ability to perform daily activity
- Provides an established alternative when angioplasty is unsuitable


