Symptoms
Symptoms include early satiety, nausea, vomiting, extreme "stabbing" postprandial abdominal pain (due to both the duodenal compression and the compensatory reversed peristalsis), abdominal distention/distortion, eructation, external hypersensitivity or tenderness of the abdominal area, and severe malnutrition accompanying spontaneous wasting. This, in turn, increases the duodenal compression, spurring a vicious cycle. "Food fear" is a common development among patients with the chronic form of SMA syndrome. Symptoms are partially relieved when in the left lateral decubitus or knee-to-chest position. A Hayes maneuver (pressure applied below the umbilicus in cephalad and dorsal direction) elevates the root of the SMA, also slightly easing the constriction. Symptoms are often aggravated when leaning to the right or taking a supine (face up) position.
Read more about this topic: Superior Mesenteric Artery Syndrome
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