A study of normal and abnormal femoral venous flow velocity using a directional doppler.
D001783:Blood Flow Velocity; D003937:Diagnosis, Differential; D005268:Femoral Vein; D006801:Humans; D011187:Posture; D012119:Respiration; D014463:Ultrasonography; D014636:Valsalva Maneuver; D014652:Vascular Diseases / Q000175:diagnosis*