Gray scale and color duplex ultrasound of great saphenous vein valve. Note closure of the valve leaflets during the valsalva maneuver.
62 year old female suffering for 30 years with pelvic venous congestion
59 year old male, smoker, sudden onset of pain and discoloration of the right 3rd toe.
30 year old female, on oral contraceptives, with severe left leg swelling after a long car ride. Ultrasound showed left iliofemoral DVT.