Location and Anatomy The portal vein is formed by the merging of the splenic vein, which brings blood from the spleen, and the superior mesenteric vein, which brings blood from the intestines.

Your hepatic veins transport low-oxygen blood from your digestive tract to your heart and ultimately to your lungs. A blockage in your hepatic veins could lead to serious problems with your liver.

Venous insufficiency is a condition in which the flow of blood through the veins is blocked, causing blood to pool in the legs. It's often caused by blood clots. We’ll describe the causes of ...

Learn the differences between arteries and veins, the body's two main types of blood vessels, with a focus on their function and structure.

Varicose veins are large, visible, superficial veins, usually seen behind the knee or down the inner part of the leg. To better understand them, you have to understand vein anatomy and function.

Varicose veins can appear as we get older. If you experience varicose veins that are uncomfortable and interrupting your everyday life, it may be time to consult your doctor.

This review details our present knowledge of the anatomy and electrophysiology of the PVs and how they relate to the left atrium.