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Related Experiment Videos

Decrease in global ejection fraction after volume challenge in long-standing hypertension.

A T Marmor, A Frankel, M Plich

    American Heart Journal
    |April 1, 1986
    PubMed
    Summary
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    A simple leg elevation test effectively differentiates recent-onset hypertension from long-standing hypertension by assessing changes in ejection fraction. This noninvasive method reveals distinct cardiac responses to volume challenges in different hypertensive groups.

    Area of Science:

    • Cardiology
    • Physiology
    • Diagnostic Methods

    Background:

    • Hypertension is a major cardiovascular risk factor.
    • Distinguishing between recent-onset and long-standing hypertension is clinically important for treatment strategies.
    • Noninvasive methods to assess cardiac function in hypertensive patients are valuable.

    Purpose of the Study:

    • To present an easy, noninvasive volume challenge method.
    • To utilize diastolic filling differences in differentiating hypertensive stages.
    • To assess cardiac response to a passive leg elevation maneuver.

    Main Methods:

    • A passive leg elevation maneuver at 45 degrees for 5 minutes was performed.
    • This induced a sudden increase in venous return.

    Related Experiment Videos

  • Global ejection fraction was measured using radionuclide ventriculography and echocardiography.

    • Main Results:

    • Global ejection fraction increased significantly in healthy subjects and patients with recent-onset hypertension.
    • A significant decrease in global ejection fraction was observed in patients with long-standing hypertension.
    • Echocardiographic results strongly correlated with radionuclide measurements (r = 0.89).

    Conclusions:

    • The leg elevation test is an effective noninvasive method to differentiate recent-onset from long-standing hypertension.
    • This method leverages the differing diastolic filling characteristics between these hypertensive groups.
    • The procedure provides a simple yet powerful tool for clinical assessment of hypertensive cardiovascular adaptation.