Answer:
Coronary artery disease may be defined as the blockage of the coronary artery due to the deposition of the hard material or deposits of the cholesterol in the artery.
The bypass graft is used for the treatment of the coronary artery disease. The pacemaker is used during the surgery to manage the heart rate that are abnormally slow. The pacemaker is inserted into the chest for the proper regulation of the heart beat. The electrical pulse is used by the pacemaker for the regular heart beat.