Cardiovascular pathology : the official journal of the Society for Cardiovascular Pathology
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Cardiovasc. Pathol. · Jan 2020
Case ReportsIntramyocardial dissecting hematoma: fatal complication of reperfusion damage in myocardial infarction - an autopsy case report.
Intramyocardial dissection or intramyocardial dissecting hematoma is uncommon complication either of myocardial infarction or severe thoracic injury. Intramyocardial dissecting hematoma is caused by intersecting bleeding between the layers of myocardial fibers. In contrast to cardiac rupture, the myocardial wall maintains its integrity. ⋯ In the necropsy, the large intramyocardial dissecting hematoma in the very superficial layer of the left ventricular myocardium was found, accompanied with very small extent of necrotic myocardium in the neighborhood of the intramyocardial dissecting hematoma. The prevailing majority of the left ventricle thickness was vital. The lack of developed transmural infarction in our case leads us to hypothesis that the increased intravascular pressure during the reperfusion is the main contributor to the intramyocardial dissecting hematoma development, together with reduced biomechanical resistance of the capillaries affected by chronic ischemia.