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What is a heart bypass surgery?

BOSTON — What is a coronary artery bypass surgery (CAB)?

The term CAB can be used interchangeably with heart bypass, or heart transplant, surgery.

A CAB is a surgical procedure that uses a thin, flexible device called a coronary arteries bypass graft, also known as an angioplasty, to replace a coronary vessel that is blocked by scar tissue or blocked by blood vessels.

The graft is made up of a mesh-like material called collagen, which is injected into the coronary artery.

The coronary artery graft can be inserted or removed.

The heart of a person who has a CAB surgery, the procedure is a type of bypass that is different from a CUB, or coronary artery device, bypass that uses the same device to bypass the blood vessels and deliver oxygen to the heart.