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?
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.
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May explain Doppler-catheter discrepancies in moderate AS with small aortas; hypothesis-generating for pressure recovery adjustments before changing practice.
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.
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