Key result
Continuous-wave Doppler ultrasound assessment of peak pressure drop showed good correlation (r = 0.85) with invasive catheterization in patients with left ventricular outflow obstruction.
Why the study?
Does Doppler ultrasound accurately estimate peak pressure drop compared to invasive catheterization in patients with left ventricular outflow obstruction?
Observational (n=33)
Does Doppler ultrasound accurately estimate peak pressure drop compared to invasive catheterization in patients with left ventricular outflow obstruction?
Effect estimate: r = 0.85
Doppler ultrasound provides a reliable noninvasive method to estimate peak pressure drops and determine the level of obstruction in patients with left ventricular outflow obstruction.
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Supports Doppler estimation of peak pressure drop in LV outflow obstruction; leaves open prospective validation before routine use.
Liv Hatle (1981) conducted an observational in Left ventricular outflow obstruction (aortic valve stenosis and fixed subaortic stenosis) (n=33). Doppler ultrasound vs. Catheterization was evaluated on Correlation between calculated pressure drops and those obtained by pressure recording (r = 0.85). Continuous-wave Doppler ultrasound assessment of peak pressure drop showed good correlation (r = 0.85) with invasive catheterization in patients with left ventricular outflow obstruction.
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