Journal of the American College of Cardiology
Clinical Studies
“overestimation” of catheter gradients by doppler ultrasound in patients with aortic stenosis: a predictable manifestation of pressure recovery
Helmut Baumgartner, Thomas Stefenelli, Julia Niederberger, Heinrich Schima and Gerald Maurer
Table 2
Table 2
Results
| Mean ± SD | Range | |
|---|---|---|
| Peak Doppler gradient (mm Hg) | 102.8 ± 46.2 | (30–240) |
| Peak catheter gradient (mm Hg) | 84.7 ± 32.4 | (34–165) |
| Observed difference between peak Doppler and peak catheter gradient (mm Hg) | 18.1 ± 18.3 | (−5–75) |
| Predicted difference between peak Doppler and peak catheter gradient (mm Hg) | 18.5 ± 15.8 | (5.4–81.6) |
| Difference between predicted and observed peak catheter gradient (mm Hg) | 0.4 ± 8.0 | (−19–12) |
| Mean Doppler gradient (mm Hg) | 67.2 ± 31.4 | (18–160) |
| Mean catheter gradient (mm Hg) | 56.2 ± 23.4 | (14–112) |
| Observed difference between mean Doppler and mean catheter gradient (mm Hg) | 11.0 ± 12.7 | (−7–48) |
| Predicted difference between mean Doppler and mean catheter gradient (mm Hg) | 12.1 ± 10.5 | (3.2–54.4) |
| Difference between predicted and observed mean catheter gradient (mm Hg) | 1.1 ± 6.8 | (−15–12) |
| Aortic valve area (cm2) by catheter | 0.69 ± 0.33 | (0.2–1.6) |
| Aortic valve area (cm2) by Doppler | 0.66 ± 0.27 | (0.4–1.4) |
| Diameter of the ascending aorta by echo | 3.06 ± 0.59 | (1.7–4.2) |
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