Retinal Artery OcclusionMesenteric Vascular OcclusionMesenteric Artery, SuperiorReperfusion InjuryAngioplasty, BalloonMesenteric ArteriesAngioplasty, Balloon, CoronarySuperior Mesenteric Artery SyndromeIntestinesCeliac ArteryMesenteric Artery, InferiorAngioplastyDuodenostomySplanchnic CirculationArteriesArterial Occlusive DiseasesAngiographyStentsRenal ArteryInfarction, Middle Cerebral ArteryConstriction, PathologicIschemiaSplenic ArteryMesenteric VeinsTreatment OutcomeTomography, X-Ray Computed