Why the study?
Discrepancies often occur between Doppler echocardiography and catheter measurements of valve effective orifice area, potentially due to pressure recovery.
Does calculating the energy loss coefficient (ELCo) from Doppler echocardiography reconcile discrepancies with catheter-derived effective orifice area in aortic stenosis?
Population
In vitro model, 14 pigs with supravalvular aortic stenosis, and catheterization data from 37 patients
Comparison
EOA(cath) vs EOA(Dop) and energy loss coefficient (ELCo)
Design
In vitro, animal, and clinical validation study
Authors
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Supports ELCo use in Doppler AS assessment; leaves open outcome benefit and should not yet change practice.
Does calculating the energy loss coefficient (ELCo) from Doppler echocardiography reconcile discrepancies with catheter-derived effective orifice area in aortic stenosis?
Discrepancies between catheter and Doppler estimates of aortic valve area are largely due to pressure recovery and can be corrected by calculating the energy loss coefficient.
Garcia et al. (2003) studied this question.
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