occurs when a part of the body, in this case, the heart, does not receive enough oxygen.
Your heart maintains a supply and demand balance for oxygen. If it requires more oxygen than your body can supply, the heart will become ischemic. This is usually manifested by chest pain
, but some people can have ischemia and not feel it (especially diabetics). If it goes on too long, it can turn into infarction
), where part of the heart muscle dies.