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Related Experiment Videos

Doppler systemic venous flow patterns: changes in children with mild/moderate pulmonic stenosis

L L Minich1, L Y Tani, R E Shaddy

  • 1Department of Pediatrics, Primary Children's Medical Center, Salt Lake City, UT 84113, USA.

Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography
|November 1, 1996
PubMed
Summary

Systemic venous flow patterns, assessed via Doppler echocardiography, reveal early signs of right-sided heart dysfunction in children with pulmonic stenosis. These findings highlight venous flow as a sensitive indicator for right ventricular hypertension.

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Area of Science:

  • Pediatric Cardiology
  • Echocardiography
  • Hemodynamics

Background:

  • Right ventricular hypertension can be challenging to detect early in pediatric patients.
  • Pulmonic stenosis is a common cause of right ventricular pressure overload.
  • Systemic venous flow patterns may reflect right heart function.

Purpose of the Study:

  • To evaluate the utility of systemic venous flow patterns in identifying mild/moderate right ventricular hypertension in children.
  • To compare venous flow characteristics between children with pulmonic stenosis and healthy controls.

Main Methods:

  • Pulsed Doppler echocardiography was used to assess tricuspid valve, superior vena caval, and hepatic vein flow.
  • Simultaneous respirometry and electrocardiography were employed.

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  • Measurements included peak velocities and velocity-time integrals during different cardiac phases.

    • Main Results:

    • Patients with pulmonic stenosis showed altered respiratory variations in superior vena caval and hepatic vein flow compared to controls.
    • Hepatic vein flow velocity-time integrals at ventricular end systole were significantly lower in patients.
    • Hepatic vein flow velocity-time integrals at atrial systole were significantly higher in patients.

    Conclusions:

    • Abnormalities in systemic venous flow patterns are detectable in children with mild/moderate pulmonic stenosis.
    • These venous flow changes may serve as a sensitive, non-invasive marker for early right-sided heart dysfunction.
    • Doppler assessment of systemic venous flow can aid in the early diagnosis and management of pediatric right heart conditions.