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  2. Are you neglecting your 'second heart'? 1 step to ... - AOL

    www.aol.com/news/neglecting-second-heart-1-step...

    Every time the calf muscle contracts, one-way valves inside the leg veins open and blood gets pushed upwards towards the heart; when the calf muscle relaxes, the valves close, which prevents blood ...

  3. Ultrasonography of chronic venous insufficiency of the legs

    en.wikipedia.org/wiki/Ultrasonography_of_chronic...

    The GSV can be located in the saphenous compartment where together with the Giacomini vein and the accessory saphenous vein (ASV) an image resembling an eye, known as the 'eye sign' can be seen. The ASV which is often responsible for varicose veins, can be located at the 'alignment sign', where it is seen to align with the femoral vessels.

  4. Venous return - Wikipedia

    en.wikipedia.org/wiki/Venous_return

    Skeletal muscle pump: Rhythmical contractions of limb muscles as occurs during normal activity such as walking, running, and swimming, promotes venous return.; Decreased venous capacitance: Sympathetic activation of veins decreases venous compliance, increases vasomotor tone, increases central venous pressure and promotes venous return indirectly by augmenting cardiac output through the Frank ...

  5. Chronic venous insufficiency - Wikipedia

    en.wikipedia.org/wiki/Chronic_venous_insufficiency

    Chronic venous insufficiency (CVI) is a medical condition characterized by blood pooling in the veins, leading to increased pressure and strain on the vein walls. [1] The most common cause of CVI is superficial venous reflux, which often results in the formation of varicose veins, a treatable condition. [2]

  6. Vein - Wikipedia

    en.wikipedia.org/wiki/Vein

    The anatomy of the veins of the heart is very variable, but generally it is formed by the following veins: heart veins that go into the coronary sinus: the great cardiac vein, the middle cardiac vein, the small cardiac vein, the posterior vein of the left ventricle, and the oblique vein of the left atrium (oblique vein of Marshall). Heart veins ...

  7. Peripheral vascular system - Wikipedia

    en.wikipedia.org/wiki/Peripheral_vascular_system

    The peripheral vascular system is the part of the circulatory system that consists of the veins and arteries not in the chest or abdomen (i.e. in the arms, hands, legs and feet). [ 1 ] [ 2 ] The peripheral arteries supply oxygenated blood to the body, and the peripheral veins lead deoxygenated blood from the capillaries in the extremities back ...