Figure 1.
(a) Superior vena cava, (b) inferior vena cava, (c) descending aorta, (d) ascending aorta and (e) pulmonary trunk flow rates were measured. The precision of flow utilizing a vein & an artery was then determined. This was done in pairs for the upper body (superior vena cava flow vs difference between ascending and descending aortic flow), lower body (inferior vena cava flow vs descending aortic flow) and whole body (sum of superior vena cava and inferior vena cava flow vs ascending aortic flow).