The left atrium is damaged and is generating a great resistance to blood coming from pulmonary vein. What happens due to this pressure?
A: back up of blood causing a subsequent back flow of blood into the inferior vena cavaB: back up of blood into the pulmonary artery causing a generation of coronary artery edemaC: back up of blood into the pulmonary vein subsequently causing blood to leave the capillaries in the lungD: back up of blood causing back flow into the superior vena cava