Key result
Doppler echocardiography overestimated catheter gradients by up to 66 mm Hg (80%) in a pulsatile flow model of aortic stenosis, particularly when the stenosis was moderate and the aorta was small.
Why the study?
Does pressure recovery cause significant differences between Doppler and catheter gradients in an in vitro model of aortic stenosis?
Population
Pulsatile flow model simulating aortic stenosis with valve areas from 0.5 to 1.25 cm2 and aortic diameters…
Comparison
Doppler ultrasound gradient measurement vs Catheter gradient measurement
Design
Preclinical
Authors
Loading...
May explain Doppler-catheter discrepancies in moderate AS with small aortas; hypothesis-generating for pressure recovery adjustments before changing practice.
Does pressure recovery cause significant differences between Doppler and catheter gradients in an in vitro model of aortic stenosis?
Pressure recovery in aortic stenosis can cause clinically relevant overestimation of gradients by Doppler ultrasound compared to catheterization, especially with moderate stenosis and small aortic diameters.
Niederberger et al. (1996) studied Aortic Stenosis. Doppler ultrasound vs. Catheter gradients was evaluated on Differences between Doppler and catheter gradients. Doppler echocardiography overestimated catheter gradients by up to 66 mm Hg (80%) in a pulsatile flow model of aortic stenosis, particularly when the stenosis was moderate and the aorta was small.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: