Pathological score

Pathological grading

Left ventricular lesions

0

The structure of the heart was normal and no obvious pathological changes were found.

1

+

Epicardium was thickened, focal myocardial cells under epicardium were swelling, degenerative and necrotic, accompanied by granulation tissue or fibrous tissue hyperplasia and the infiltration of a small amout inflammatory cells.

2

++

Epicardium was thickened, small patchy myocardial cells under epicardium were necrotic, granulation tissue or fibrous tissue was mildly hyperplastic, and a small amount of inflammatory cells were infiltrated.

3

+++

Epicardium was thickened, patchy myocardial cells under epicardium were necrotic, accompanied by the hyperplasia of granulation tissue or fibrous tissue and the infilatration of a small amount inflammatory cell.

4

++++

Large area myocardium was infarcted (transmural infarct), granulation tissue or fibrous scar tissue was significantly increased, the ventricular wall was significantly thin.