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.
Abdominal pain in mesenteric ischemia: Abdominal pain in mesenteric ischemia is a condition in which a person with mesenteric ischemia is experiencing abdominal discomfort. See detailed information below for a list of 3 causes of Abdominal pain in mesenteric ischemia, including diseases and drug side effect causes. Â» Review Causes of Abdominal pain in mesenteric ischemia: Causes.