BAsic information description Chest pain or discomfort due to a decrease in the blood (and oxygen) supply to the heart muscle (myocardium). Angina may be stable (symptoms are predictable), or unstable (symptoms are unexpected and usually occur while at rest). Angina affects adults of both sexes. frequent signs and symptoms Tightness, squeezing, pressure, fullness, ache, or pain in the center of the chest. Chest pain similar to indigestion. Discomfort or pain may also occur in the...