How can coronary artery disease present itself?

How can coronary artery disease present itself? In patients where the furring progresses to form a more significant narrowing this can manifest itself as angina or chest pain, chest tightness or breathlessness on exertion and the reason for this is that at rest a narrowing does not impede enough blood flow to cause a problem, however when one is aiming to exercise or exert themselves, for example walk up a hill, the heart requires more blood and more oxygen to the muscle and the narrowing impedes blood flow and this is manifest or felt by an individual with chest pain or breathlessness and in that setting If medical therapy to treat angina is not sufficient, then we may suggest further investigation and treatment with either a stent or coronary angioplasty to stretch that narrowing open to restore blood flow, or if the disease is very widespread in certain distributions or is or is technically challenging for stent implantation, then we may suggest a coronary artery bypass operation where we can bypass these narrowings once again to restore blood flow with the aim of improving symptoms and outcomes.