Oxygen-rich blood flows from the lungs through the left upper
chamber (atrium) of the heart into the left lower chamber (ventricle) of the
heart. The left ventricle muscle contracts to pump blood out through the
aorta—a large blood vessel carrying blood out of the heart—to the rest of the
Rakesh K. Pai, MD, FACC - Cardiology, Electrophysiology & Stephen Fort, MD, MRCP, FRCPC - Interventional Cardiology
How this information was developed to help you make better health decisions.