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Physiological left ventricular hypertrophy.

L M Shapiro

    British Heart Journal
    |August 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Strenuous athletic activity causes left ventricular hypertrophy, an appropriate adaptation to exercise intensity and body size. This cardiac remodeling is reversible in ex-athletes.

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    Area of Science:

    • Cardiology
    • Sports Medicine
    • Physiology

    Background:

    • Athletic training is known to induce cardiac adaptations.
    • Left ventricular hypertrophy (LVH) is a common finding in athletes.
    • Understanding the specific factors influencing LVH in athletes is crucial.

    Purpose of the Study:

    • To investigate cardiac structural changes in athletes using echocardiography.
    • To compare cardiac dimensions and mass between athletes, ex-athletes, and non-athletes.
    • To determine if the type of sport influences the degree of left ventricular hypertrophy.

    Main Methods:

    • Echocardiograms were performed on 154 active athletes, 21 ex-athletes, and 40 healthy controls.
    • Measurements included diastolic cavity dimension, wall thickness, and left ventricular mass.

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  • Calculated ratios included posterior wall thickness to cavity radius and septum to posterior wall thickness.

    • Main Results:

    • Athletes exhibited significantly increased left ventricular mass, cavity dimension, and wall thickness compared to controls.
    • No specific subgroup of athletes (e.g., weightlifters) showed disproportionate hypertrophy.
    • Ex-athletes displayed normal cardiac dimensions and wall thickness.
    • National-standard athletes showed greater cardiac remodeling than university or non-competitive athletes.

    Conclusions:

    • Strenuous physical activity induces appropriate left ventricular hypertrophy.
    • The degree of hypertrophy correlates with activity intensity and body size, not sport type.
    • Cardiac adaptations in athletes are generally reversible upon cessation of training.