Key result
Continuous wave Doppler echocardiography reliably estimated pressure gradients compared to cardiac catheterization, with correlation coefficients of 0.76 (peak-to-peak) and 0.78 (instantaneous).
Why the study?
Does continuous wave Doppler echocardiography accurately estimate pressure gradients compared to cardiac catheterization in children with ventricular outflow tract obstruction?
Observational (n=27)
Single-blind
Does continuous wave Doppler echocardiography accurately estimate pressure gradients compared to cardiac catheterization in children with ventricular outflow tract obstruction?
Continuous wave Doppler echocardiography reliably estimates ventricular outflow tract pressure gradients in children, correlating well with invasive catheterization.
Supports noninvasive gradient assessment in pediatric outflow obstruction; leaves open need for prospective validation before practice change.
Continuous wave Doppler echocardiography was used to estimate pressure gradients in 27 children with right or left ventricular outflow tract obstruction. The pressure gradients predicted by Doppler were compared to peak-to-peak and instantaneous gradients measured at cardiac catheterization. When the Doppler study was performed the pressure gradient obtained at catheterization was not known to the examiner. A correlation coefficient of 0.76 was found for the comparison between the Doppler predicted gradient and the peak-to-peak gradient and 0.78 for the comparison with the instantaneous pressure gradient. Clinically significant obstructions could be reliably separated from insignificant obstructions by the Doppler technique.
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Björkhem et al. (1986) conducted an observational in Right or left ventricular outflow tract obstruction (n=27). Continuous wave Doppler echocardiography vs. Cardiac catheterization was evaluated on Correlation between Doppler predicted gradient and gradient measured at cardiac catheterization (r = 0.76 (peak-to-peak) and r = 0.78 (instantaneous)). Continuous wave Doppler echocardiography reliably estimated pressure gradients compared to cardiac catheterization, with correlation coefficients of 0.76 (peak-to-peak) and 0.78 (instantaneous).
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