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 ...

Medically reviewed by Jeffrey S. Lander, MD Venous hypertension is a common medical condition, especially in older adults, ...

A pulmonary arteriovenous malformation is an abnormal connection between an artery and a vein within the lungs that allows deoxygenated venous blood to pass directly into the system circulation.