The veins constitute a reservoir for the blood supply, not merely a system of passive conduits. They constrict and dilate actively, thus maintaining a satisfactory distribution of blood in the body ...

Venous insufficiency is a problem with the flow of blood from the veins of the legs back to the heart. It's also called chronic venous insufficiency or chronic venous stasis. Your veins bring blood ...

23] had the ultrasonographic software to calculate blood flow volume quantitatively, [23] or differentiated between the superficial venous system and the more clinically important deep venous system.

Cerebral venous sinus thrombosis (CVST ... adjacent infectious processes, low cerebral blood flow, oral contraceptives, hormone replacement therapy, pregnancy, and puerperium (Benamer & Bone ...