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A phonocardiographic study of equine heart sounds

B Vanselow, M McCarthy, C C Gay

    Australian Veterinary Journal
    |April 1, 1978
    PubMed

    Insights

    This study analyzed equine heart sounds using phonocardiograms, identifying 10 distinct sound events per cardiac cycle. The mitral valve area proved most effective for routine horse phonocardiography.

    Area of Science:

    • Veterinary Cardiology
    • Equine Physiology

    Background:

    • Understanding equine heart sounds is crucial for diagnosing cardiac conditions in horses.
    • Phonocardiography is a key diagnostic tool, but optimal recording areas require definition.

    Purpose of the Study:

    • To analyze the occurrence and timing of heart sound events in horses.
    • To determine the most suitable recording area for routine equine phonocardiography.

    Main Methods:

    • Phonocardiograms were recorded from the mitral, aortic, and tricuspid areas in 18 horses.
    • Analysis focused on identifying and characterizing sound events within each cardiac cycle.

    Main Results:

    • Up to 10 distinct sound events were identified per cardiac cycle.
    • The first heart sound comprised 4 components; the second was single; the third heart sound had 2 components.
    • The occurrence of third and fourth heart sound components varied across horses and recording sites.

    Conclusions:

    • The mitral recording area is recommended for routine phonocardiographic studies in horses.
    • Variability in third and fourth heart sound components highlights the need for careful interpretation.

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