title: [CHANGE IN THE CONDITION OF LOWER LIMB VEINS IN COSMONAUTS ON LONG-DURATION MISSIONS].
abstract: The paper reports changes in the main parameters of the lower limb veins in 36 cosmonauts in the course of 6-month space missions. Major reduction in the leg volume was shown in all cosmonauts, as well as a significant increase of venous capacity and compliance. Rate of vein filling exhibited different trends, i.e. decreased in the majority of cosmonauts (n = 26, 74%) and increased in the rest (n = 9, 26%). Increases in venous capacity, compliance and filling rate may impact orthostatic stability (OS). These changes are among the pathophysiological mechanisms of the OS loss in space flight.
authors.forename: A R
authors.initials: AR
authors.lastname: Kotovskaya
authors.forename: G A
authors.initials: GA
authors.lastname: Fomina
authors.forename: A V
authors.initials: AV
authors.lastname: Salnikov
mesh_terms: D000328:Adult; D018480:Astronauts; D004548:Elasticity; D005500:Follow-Up Studies; D006439:Hemodynamics / Q000502:physiology*; D006801:Humans; D035002:Lower Extremity / Q000098:blood supply*; D008297:Male; D008875:Middle Aged; D011187:Posture / Q000502:physiology*; D012146:Rest; D013026:Space Flight; D013997:Time Factors; D014680:Veins / Q000502:physiology*