Angina refers to the pain arising from lack of adequate blood supply to the heart muscle. Typically, it is a crushing pain behind the breastbone in the center of the chest, brought on by exertion and relieved by rest. It may at times radiate to or arise in the left arm, neck, jaw, left chest, or back. It is frequently accompanied by sweating, palpitations of the heart, and generally lasts a matter of minutes. Similar pain syndromes may be caused by other diseases,including esophagitis, gall bladder disease, ulcers, and others. Diagnosis of angina begins with the recognition of the consistent symptoms. Often an exercise test wi....

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