What does heart bypass mean?

Coronary artery bypass grafting (CABG) is a medical term for coronary artery bypass grafting (CABG). CABG is performed when coronary artery stenosis causes severe angina pectoris and myocardial infarction. Its principle is to connect the patient's aorta and coronary artery, cross the stenosis site, and build a bridge in the middle, so that blood flow can be communicated again.