How can a coronary artery bypass graft (cabg) be helpful to patients?

Saves lives. CABG surgery has been shown to prolong life and prevent myocardial infarction as well as relieve angina.
Revascularizes. In this operation the blocked coronary arteries are bypassed with vein grafts to bring in new blood to those affected areas of heart muscle. It relieves symptoms of angina and makes patients live longer.
Many ways. CABG can provide relief of anginal symptoms and improve one's quality of life. It can improve overall mortality depending on the coronary arteries involved an overall function of the heart. Those patients with significant heart dysfunction and significant coronary disease often receive the most long term benefit from surgery.