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Fibrous repair following myocardial infarction: light micrograph of infarcted human heart muscle (myocardium) from the left ventricle, revealing the fibrous repair process that occurs in surviving cases. In myocardial infarction (a heart attack), an obstruction in a major coronary artery results in the death of a significant section of heart muscle, often in the left ventricle. Here, necrotic heart muscle fibres appear densely- stained dark red. At bottom, between the necrotic fibres are bands of purple-staining fibrous tissue. Magnification: x100 at 6x7cm size, x50 at 35mm size.
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