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[Cardiac function noninvasively evaluated by phasic pattern analysis of ventricular power during ejection].

I Takahashi, Y Miyashita, K Takayama

    Journal of Cardiography
    |March 1, 1986
    PubMed
    Summary
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    Noninvasive assessment of cardiac function using ventricular power (power) and its rate of change (dPower/dt) proved effective. Lower ejection fraction patients showed significantly reduced peak dPower/dt, indicating clinical utility for cardiac contractility evaluation.

    Area of Science:

    • Cardiology
    • Biomedical Engineering
    • Physiology

    Context:

    • Assessing cardiac function noninvasively is crucial for diagnosing and managing heart conditions.
    • Traditional methods for evaluating cardiac contractility can be invasive or limited in scope.
    • Ventricular power and its rate of change offer a novel approach to hemodynamic assessment.

    Purpose:

    • To evaluate the noninvasive assessment of ventricular power and the rate of change of power (dPower/dt) for determining cardiac function.
    • To compare dPower/dt values in normal subjects and patients with coronary artery disease (CAD) with varying ejection fractions.
    • To establish the clinical utility of dPower/dt as an index of cardiac contractility.

    Summary:

    • Ventricular power was calculated from noninvasively measured aortic flow and brachial arterial pressure.

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  • Peak dPower/dt was significantly lower in patients with ejection fraction less than 50% compared to normal subjects and those with higher ejection fractions.
  • The study found no significant difference between noninvasively calculated power patterns and invasively measured aortic pressure.

    • Impact:

    • This noninvasive method provides a clinically useful index for evaluating cardiac contractility.
    • The dPower/dt metric can aid in the early detection and assessment of impaired cardiac function.
    • This approach has the potential to improve patient care by offering a less invasive diagnostic tool.