Angina
Angina is temporary chest pain or discomfort resulting from reduced blood supply to the heart muscle. It occurs because part of the heart muscle is temporarily unable to get enough blood and oxygen to meet its needs.
Angina usually occurs when the heart has to work harder than usual because its requirement for blood and oxygen has increased. This can happen, for example, during exercise or effort, or in response to emotion. It doesn’t occur all the time because the blood supply, although reduced, is usually able to keep up with the hearts normal demands.
Angina does not mean that the heart muscle is damaged, so it isn’t the same as a heart attack. Many people with angina never experience a heart attack but they are at higher risk. If it’s not treated effectively, angina can interfere with an active lifestyle.