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May 1, 1986CirculationOpen Access

Calculation of aortic valve area by Doppler echocardiography: a direct application of the continuity equation.

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Why the study?

Does Doppler echocardiography accurately determine aortic valve area compared to catheterization in patients with aortic stenosis?

Population

32 subjects (10 control subjects and 22 patients with predominant aortic stenosis)

Comparison

Doppler echocardiography measuring ratio of… vs Aortic valve area determined at catheterization…

Design

Cross-sectional

Authors

KRKent L. RichardsBaylor College of MedicineSCScott CannonThe University of Texas Southwestern Medical CenterJMJ. MillerBrooke Army Medical Center

Discussion

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Implication

Doppler velocity ratios correlate with invasive AVA; supports non-invasive assessment but leaves open prospective outcome validation.

Structured PICO

Does Doppler echocardiography accurately determine aortic valve area compared to catheterization in patients with aortic stenosis?

P
Population
32 subjects (10 control subjects and 22 patients with predominant aortic stenosis)
I
Intervention
Doppler echocardiography measuring ratio of mitral/aortic valve orifice velocities ((Vm)/(Va) and (VTm)/(VTa))
C
Comparator
Aortic valve area determined at catheterization by the Gorlin equation
O
Outcome
Correlation between Doppler-determined velocity ratios and Gorlin valve areasurrogate

Doppler echocardiography using velocity ratios provides a highly accurate, non-invasive method for determining aortic valve area in patients with aortic stenosis, correlating well with invasive catheterization measurements.

Limitations

  • Requires accurate measurement of mitral and aortic velocities
  • Applicable only to adults with absent or mild aortic or mitral regurgitation and no mitral stenosis

Cite This Study

Richards et al. (1986) studied this question.

synapsesocial.com/papers/6a887bea60f64afcf1609018https://doi.org/10.1161/01.cir.73.5.964

Topics

Valvular heart diseaseMitral valve interventionEchocardiography
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Doppler Echocardiography1973 · 132 citations
  2. 2Doppler Ultrasound in Cardiology: Physical Principles and Clinical Applications1983 · 520 citations
  3. 3A new method to calculate aortic valve area without left heart catheterization.1984 · 73 citations
  4. 4Prediction of the severity of left ventricular outflow tract obstruction by quantitative two-dimensional echocardiographic Doppler studies.1983 · 100 citations
  5. 5Detection and estimation of the degree of mitral regurgitation by range-gated pulsed doppler echocardiography.1980 · 312 citations