The histological structures to be evaluated are the: | The numeric grading system estimates the percent disruption of each histological structure and will be scored according to the following scale [2]: | |
---|---|---|
endothelial layer | 0 | Intact or not disruption |
elastic lamina | 1 | < 10% |
medial smooth muscle and connective tissue | 2 | 10-25% |
adventitial connective tissue. | 3 | 25-50% |
 | 4 | > 50% |