1.   An evaluation last fall found the bypass grafts still open and functioning, though sooner or later they may need to be replaced.

2.   He was back at the hospital a few months later when his bypass graft closed, tended by the same nurse.

3.   Last Friday Weldon successfully underwent a coronary artery bypass graft in Maryland after doctors detected blockage in his coronary artery.

4.   Surgeons in some regions perform three times as many coronary bypass grafts or non-emergency prostate operations as their colleagues in other regions.

5.   The figures did not account for the types of bypass grafts the patients received.