“…8B and C, neointimal area and thickness at 1 month post-implantation were 2.4 ± 0.4 mm 2 , 0.29 ± 0.04 mm; 3.3 ± 0.4 mm 2 , 0.42 ± 0.04 mm; 2.3 ± 0.1 mm 2 , 0.27 ± 0.02 mm; 3.3 ± 0.3 mm 2 , 0.42 ± 0.04 mm; 4.3 ± 0.1 mm 2 , 0.57 ± 0.02 mm; and 2.1 ± 0.2 mm 2 , 0.22 ± 0.02 mm for BMSs, stents coated with Co90, Hep-Co90, Hep-Co80 and Hep-Co70, and As 2 O 3 -eluting stents, respectively. Although heparin immobilization is expected to improve the biocompatibility of polymer coatings [38][39][40][41][42], distinctive vessel narrowing and a remodeling effect on the surrounding tissue induced by the severe inflammatory response could be observed in the stents coated with Co90, Hep-Co80 and Hep-Co70, as shown in Fig. 7B, D and E, respectively.…”