Mesenteric ischemia is defined by stenosis or occlusion of at least how many of the three major arteries?

Mesenteric ischemia is defined by stenosis or occlusion of at least how many of the three major arteries?

• A. One
• B. Three
• C. Two
• D. All four

Answer: (C)

Chronic mesenteric ischemia is defined by having significant disease in two of the three major arteries that supply the intestines: the celiac trunk, the superior mesenteric artery, and the inferior mesenteric artery. If only one artery is narrowed, collateral circulation from the other vessels often preserves gut perfusion and symptoms may be absent. When two of the three are stenosed or occluded, overall blood flow to the intestines can drop enough to cause ischemia, especially after meals when the demand for blood increases. That threshold—two involved arteries out of the three major ones—explains why this is the standard definition.

Chronic mesenteric ischemia is defined by having significant disease in two of the three major arteries that supply the intestines: the celiac trunk, the superior mesenteric artery, and the inferior mesenteric artery. If only one artery is narrowed, collateral circulation from the other vessels often preserves gut perfusion and symptoms may be absent. When two of the three are stenosed or occluded, overall blood flow to the intestines can drop enough to cause ischemia, especially after meals when the demand for blood increases. That threshold—two involved arteries out of the three major ones—explains why this is the standard definition.