part of cellular extravasation leukocyte activation-dependent arrest biological_process The formation of an integrin-dependent strong adhesive bond between leukocytes and blood vessel endothelial cells which is dependent on prior activation of the leukocyte and leads to the firm attachment of the leukocyte to the endothelial surface, typically the third step in cellular extravasation. GO:0050903 leukocyte adhesion to vascular endothelial cell