The pulmonary artery carries oxygen-depleted blood from the right
side of the heart to the lungs, where it is re-oxygenated. The freshly
oxygenated blood then travels to the left side of the heart through the
pulmonary vein to be pumped to the rest of the body.
Rakesh K. Pai, MD, FACC - Cardiology, Electrophysiology & John A. McPherson, MD, FACC, FSCAI - Cardiology