Venography is an imaging test that uses contrast to show veins.
Doctors use venography when they need a detailed look at the veins because of swelling, suspected clot, a venous malformation, difficult vein access planning, or before some interventions.
It helps show how blood is flowing through veins, whether a vein is blocked or narrowed, and how the venous anatomy looks before treatment.
It may be used when detailed venous anatomy, blockage, malformation, or procedural guidance is needed.
Its result can help guide clot treatment, intervention planning, or surgical decisions.
This entry explains the procedure. Before you go, read the longer prep guide or find a centre that performs it.
