Key result
Continuous wave Doppler echocardiography accurately predicted pressure gradients across prosthetic valves, correlating closely with simultaneous catheter measurements (r=0.94 for maximal gradients).
Why the study?
Does continuous wave Doppler echocardiography accurately measure pressure gradients compared to simultaneous cardiac catheterization in patients with prosthetic valves?
Observational (n=36)
Does continuous wave Doppler echocardiography accurately measure pressure gradients compared to simultaneous cardiac catheterization in patients with prosthetic valves?
Effect estimate: r = 0.94 (maximal gradient), r = 0.96 (mean gradient)
Continuous wave Doppler echocardiography accurately predicts maximal and mean pressure gradients across prosthetic valves when compared to simultaneous cardiac catheterization.
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Supports noninvasive prosthetic valve gradient assessment; leaves open prospective validation across valve types and populations.
Burstow et al. (1989) conducted an observational in Prosthetic heart valves (n=36). Continuous wave Doppler echocardiography vs. Cardiac catheterization was evaluated on Correlation between maximal and mean pressure gradients measured by Doppler and catheterization (r = 0.94 (maximal gradient), r = 0.96 (mean gradient)). Continuous wave Doppler echocardiography accurately predicted pressure gradients across prosthetic valves, correlating closely with simultaneous catheter measurements (r=0.94 for maximal gradients).
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