Pressure Contour Analysis in the Assessment of Arterial Stenosis

Murie, J. A.; Quin, R. O.; Forrest, H.; Sheldon, C. D.
July 1983
Angiology;Jul1983, Vol. 34 Issue 7, p445
Academic Journal
Femoral artery pressure contour can be measured directly by percutaneous needle puncture and may be a useful indicator of proximal vessel stenosis. Pressure waveform in 53 limbs was compared with radiological appearance of the aorto-iliac segment. Forty-one limbs were graded angiographically as normal and 12 as stenosed. Pressure contour was studied at rest and after intra-arterial injection of papaverine. The following parameters were examined: 1. systolic pressure at rest 2. systolic pressure after papaverine 3. percent reduction of systolic pressure after papaverine 4. pulse pressure at rest 5. pulse pressure after papaverine 6. percent reduction in pulse pressure after papaverine 7. maximal gradient (dp/dt) at rest 8. maximal gradient after papaverine: p<0.001 (Figure 5b) 9. maximal gradient after papaverine/maximal gradient at rest: p< 0.05 (Figure 6) A significant difference between the angiographic normal and stenotic groups was found in the values of all parameters. P<0.001 for 1 to 8 inclusive; p<0.05 for 9. Good discrimination between groups was achieved only by 3, 6 and 8. Three produced the best discrimination: systolic pressure reduction after papaverine ⩾14 per cent indicating stenosis (1 in 12 false negative) and <14 per cent indicating no stenosis (no false positive).


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