91.   He also had a quadruple bypass operation.

92.   He also joked about his bypass operation, which involves surgically creating new paths for blood to flow to his heart.

93.   He had a bypass operation in February.

94.   He underwent a heart bypass operation on Tuesday and suffered a fatal heart attack on Wednesday.

95.   His doctors are worried enough to seek to postpone the heart bypass operation which he should have undergone before the end of the month.

96.   However, the man also received a coronary bypass operation, so doctors cannot be sure how much of his change is due to the transplant.

97.   In a bypass operation, surgeons take a piece of blood vessel and sew it into place to create a detour around a clog in a heart artery.

98.   In bypass operations, surgeons cut open the chest and graft new blood vessels to increase blood flow to the heart.

99.   It came during a year Letterman had to take a break for an emergency quintuple bypass operation in January.

100.   Malaysian Foreign Minister Abdullah Ahmad Badawi had a coronary bypass operation on Tuesday at the National Heart Institute, officials said Wednesday.