Score | Type of changes |
---|---|
0 | No pathological findings or negligible number of inflammatory cells present. |
0.1-0.9 | Increasing number of inflammatory cells per foci and moderate myocyte necrosis per foci. |
1 | One or a few distinct focal lesions with cardiomyocyte necrosis, and distinct infiltration of leukocytes (1-5 per foci) |
1.1-1.9 | Increasing number of lesion individually increasing in size per focus |
2 | Several distinct lesions and increased number of leukocytes |
2.1-2.9 | Multifocal myonecrosis with increasing number of inflammatory cells |
3 | Multifocal to confluent lesions and moderate to severe increase in number of leukocytes |
3.1-3.9 | Increasing number of foci towards diffuse lesions. Inflammation increases as do endothelial hyperplasia. |
4 | Severe confluent lesions comprising >75% of the tissue and massive leukocyte infiltration |