Task: Sentence Expansion
Input (English): It is also known as coronary artery bypass graft ( CABG , pronounced " cabbage " ) surgery , and known by doctors as heart bypass or bypass surgery .
Output (English): Coronary artery bypass surgery , also known as coronary artery bypass graft ( CABG , pronounced " cabbage " ) surgery , and colloquially heart bypass or bypass surgery , is a surgical procedure to restore normal blood flow to an obstructed coronary artery .