Angina Pectoris Symptoms - Health

At rest, there is sufficient blood and oxygen supply to the heart and no pain is felt. However, under conditions of exertion or strain, there is insufficient oxygen delivered to the heart muscle, and also the pain of angina is felt. Stable angina is not a heart attack, but can indicate the opportunity of a heart attack occurring within the future. It may occur at times respite, comparable to during sleep, or it could occur during exercise. Unstable angina occurs on account of a sudden interruption of blood circulation to the heart, and is caused by a partial or complete blockage in the

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