Brachiocephalic VeinsBrachiocephalic TrunkVena Cava, SuperiorAzygos VeinPhlebographySuperior Vena Cava SyndromeJugular VeinsCatheterization, Central VenousVeinsSternotomyConstriction, PathologicHemangioma, CavernousAneurysmTomography, X-Ray ComputedSaphenous VeinPortal VeinArteriovenous Shunt, SurgicalVaricose VeinsSubclavian VeinFemoral VeinSubclavian Artery