Current medical opinion is that cardiac bypass does not significantly improve old infarction.
An old infarction is the result of an acute myocardial infarction causing myocardial necrosis, which is replaced by scarring of the myocardium. Cardiac bypass surgery, also known as coronary artery bypass surgery, is a surgical procedure that restores blood flow to the heart muscle by bridging a blood vessel from an artery or vein over the blocked area of a coronary artery.
Since the heart muscle is a non-renewable cell, restoring the blood supply through cardiac bypass surgery will not restore the area of the old infarction. Therefore, it is currently believed that cardiac bypass does not significantly improve old infarcts, but cardiac bypass restores blood flow to other ischemic myocardium in the corresponding area, and improves the symptoms of myocardial ischemia outside of the infarcted area.
The specific situation varies from person to person. If you feel unwell, you should seek medical advice and follow the doctor’s instructions.