Hypertension, PulmonaryVenous PressurePortal VeinHypertensionHypertension, PortalVaricose UlcerVenous InsufficiencyAxillary VeinFemoral VeinArteriovenous Shunt, SurgicalCerebral VeinsPortal SystemKlippel-Trenaunay-Weber SyndromeArteriovenous FistulaVaricose VeinsCentral Nervous System Vascular MalformationsSubclavian VeinUpper Extremity Deep Vein ThrombosisCentral Venous PressureVeinsCranial SinusesBrachiocephalic VeinsPortal PressureConstriction, PathologicJugular VeinsPhlebographyHypertension, RenalBlood PressureLigationSaphenous VeinPulmonary EdemaAntihypertensive AgentsHypertension, RenovascularHemodynamicsRenal DialysisLegHypertension, MalignantChronic DiseaseVascular PatencyVascular Surgical ProceduresMicrocirculationTreatment OutcomeLiver CirculationHypertension, Pregnancy-InducedEsophageal and Gastric Varices