Vein A blood vessel that carries deoxygenated blood back to the heart from other areas of the body. Related Articles: Glossary: IVEpisode 19: A Real Diabetes Patient Story – Living with Peripheral Artery Disease (PAD)Episode 20: Diabetes and Cardiovascular DiseaseEpisode 21: Diabetes and Heart FailureEpisode 24: Treatment of Diabetic Kidney Disease