Hemodynamic Significance of Iliac Artery Stenosis: Pressure Measurements During Angiography

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Abstract
Peak systolic pressure gradients were obtained before and after vasodilation in 42 patients (50 limbs) with arteriographic iliac artery stenosis of questionable significance. Patients were divided into 3 groups according to percent narrowing of the iliac artery. Pressure gradients across the site of stenosis tended to be significant in patients with > 75% stenosis (.gtoreq. 20 mm Hg) but not in patients with < 50% stenosis; patients in the middle group (50-75% stenosis) showed a wide variance. The arteriogram is not an accurate indicator of hemodynamically significant lesions, particularly in patients with 50-75% stenosis, where pressure measurements are of greatest value. Variations in the aortic and femoral artery systolic peak pressure occurred after vasodilation, indicating the importance of simultaneous pressure recording.

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