venous valves


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Related to venous valves: venous sinus, respiratory pump

venous valves

any of the small cusps or folds found in the tunica intima of many veins, serving to prevent backflow of blood.
References in periodicals archive ?
Catheter directed thrombolysis for treatment of ilio-femoral deep venous thrombosis is durable, preserves venous valve function and may prevent chronic venous insufficiency.
If thrombus from backwalling or presence of venous valves can be highlighted and mapped, it can decrease the amount of miscannulations and infiltration experienced.
DVT usually begins around the leaflets of venous valves, especially in the calves, and can propagate superiorly.
Elevation of the affected leg will improve venous return and reduce edema (the increased gravity will help to drain fluid back to the systemic circulation through the porous vessel walls, through incompetent venous valves back to the systemic circulation).
These include unsuitable branching angle of coronary veins and tortuosity of coronary sinus anatomy, postoperative deformation, presence of venous valves, absence of vessel in target location, and coronary venous stenosis (2, 3).
Fabricius was also the discoverer of the venous valves, which later proved crucial to the theory of blood circulation (1, 2).
Technical issues include an inability to contrast the peripheral veins in the lower extremities and hands, probably because of venous valves.