IPLab:Lab 3:Acute Myocardial Infarction

Images

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  This is a low-power photomicrograph of infarcted heart. There is a layer of surviving myocardial tissue (1) along the epicardium and then a blue line (2) which represents the accumulation of inflammatory cells at the border of the infarct. There is thrombotic material (3) adherent to the endocardial surface.
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  This is a higher-power photomicrograph which shows more clearly the viable tissue along the epicardium (1), the blue line of inflammatory cells (2), and the infarcted myocardium (3).
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  This is a photomicrograph of the edge of the infarct with normal tissue on the left (1). The accumulation of inflammatory cells (2) is at the edge of the infarcted tissue (3).
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  This is a higher-power photomicrograph of the edge of the infarct. The accumulation of inflammatory cells is on the left (1) and the infarcted tissue is on the right (2). Note that intact cells can be seen in the infarct but there are no nuclei.
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  This is a high-power photomicrograph of another area of this section. There are several hypereosinophilic cells within this section (arrows).
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  This is a low-power photomicrograph of a mural thrombus (1) adherent to the endocardial surface (arrows).
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  This is a photomicrograph of the lines of Zahn. Pale areas (1) represent platelets with some fibrin and the darker lines (2) represent RBCs and leukocytes enmeshed in fibrin strands.

Mural thrombosis is the formation of multiple thrombi along an injured endocardial wall.