A<unk>  occurs when blood flow to a section of<unk>  muscle becomes blocked. If the flow of blood isn’t restored quickly, the section of<unk>  muscle becomes damaged from lack of oxygen and begins to die.<unk>  is a leading killer of both men and women in the United States. But fortunately, today there are excellent treatments for<unk>  that can save lives and prevent disabilities. Treatment is most effective when started within 1 hour of the beginning of symptoms. If you think you or someone you’re with is having a<unk> , call 9–1–1 right away.
Heart attack
Angina pectoris
Angina
Acute coronary syndromes
Pulmonary hemorrhage
Intracranial hemorrhage
Stroke
Atrial infarction