Can angina be caused by blockage of one or more coronary of the arteries?

Yes, angina can be caused by the blockage of one or more coronary arteries. This blockage restricts blood flow to the heart muscle, leading to chest pain or discomfort, especially during physical exertion or stress. The condition is often a result of coronary artery disease, where plaque buildup narrows the arteries. When the heart doesn't receive enough oxygen-rich blood, angina symptoms can occur.