The left ventricle pumps blood through the aortic semilunar valve into the aorta. From the aorta, blood enters into systemic circulation throughout the body tissues until it returns to the heart via the vena cava and the cycle repeats.he left ventricle pumps blood through the aortic semilunar valve into the aorta. From the aorta, blood enters into systemic circulation throughout the body tissues until it returns to the heart via the vena cava and the cycle repeats.
The signs and symptoms of superior mesenteric artery syndrome vary but may include: 1  Feeling full quickly when eating. 2  Bloating after meals. 3  Burping (belching)  Nausea and vomiting of partially digested food or bile-like 1  liquid. Small bowel obstruction.  Weight loss.
Superior mesenteric artery (SMA) syndrome (also known as Wilkie syndrome) is a rare acquired vascular compression disorder in which acute angulation of superior mesenteric artery (SMA) results in compression of the third part of the duodenum leading to obstruction.uperior mesenteric artery (SMA) syndrome (also known as Wilkie syndrome) is a rare acquired vascular compression disorder in which acute angulation of superior mesenteric artery (SMA) results in compression of the third part of the duodenum leading to obstruction.