This　computational　study　is　motivated　by　the　fact　that　there　is　still　incomplete　knowledge　to　date　about　hemodynamics　of　stented　aortic　arch　aneurysms　harboring　a　bleb.　The　hemodynamics　in　the　stented　and　nonstented　models　of　aortic　aneurysms　were　analyzed　and　compared　using　the　method　of　computational　fluid　dynamics.　Flow　activities　inside　the　stented　aneurysm　model　were　significantly　diminished,　specifically　the　pressure　and　wall　shear　stress　in　the　bleb　were　decreased,　thus　promoting　intra-aneurysmal　thrombus　development　and　attenuating　aneurysm　rupture　risk.　The　present　study　indicated　that　it　is　effective　to　treat　aortic　arch　aneurysms　with　endovascular　stents.　©　2005　IEEE.