Figure 6.

Pathological changes one week after the second embolization (S) and three weeks after the third embolization (T). S3: recanalization and invasive fibrous tissues were (red arrow) observed in PE group A one week after the second embolization. S4: inflammatory cell infiltration and incomplete recanalization in PE group B one week after the second embolization. T4–T4iii: thicker vascular walls, intimal hyperplasia (small red arrow in T4) and onion skin-like hyperplasia were found in PE group B three weeks after the third embolization. (1, normal saline control group; 2, carrageenan control group; 3, PE group A; 4, PE group B). PE, pulmonary embolism.