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Related Experiment Videos

Increased myocardial capillary density in dogs with experimental emphysema.

P A Martorana, P van Even, B Wüsten

    Laboratory Investigation; a Journal of Technical Methods and Pathology
    |May 1, 1984
    PubMed
    Summary

    In beagle dogs with emphysema, capillary density in the right ventricle and left ventricle subendocardium increased. This suggests an adaptation to increased oxygen demand or early cardiac hypertrophy.

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    Area of Science:

    • Cardiovascular Physiology
    • Pulmonary Medicine
    • Comparative Pathology

    Background:

    • Cardiac capillary density varies between ventricles and myocardial layers.
    • Emphysema is a condition that can impact cardiovascular function.
    • Myocardial oxygen demand can increase in response to pulmonary disease.

    Purpose of the Study:

    • To investigate the changes in cardiac capillary density in beagle dogs with experimentally induced emphysema.
    • To determine if emphysema affects capillary distribution within the ventricles.
    • To explore potential adaptations of the heart to emphysema-induced stress.

    Main Methods:

    • Induction of emphysema in beagle dogs using papain.
    • Histological examination of cardiac tissue 6 months post-induction.

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  • Quantification of capillary density in the right ventricle, left ventricle subendocardium, and left ventricle subepicardium.

    • Main Results:

    • Control dogs showed typical capillary density patterns.
    • Emphysematous dogs exhibited significantly increased capillary density in the right ventricle and left ventricle subendocardium.
    • Capillary density in the left ventricle subepicardium remained unchanged in emphysematous dogs.

    Conclusions:

    • Emphysema induces significant morphologic adaptations in cardiac vasculature.
    • Increased capillary density may be a compensatory mechanism for heightened myocardial oxygen demand.
    • These vascular changes could indicate early stages of cardiac hypertrophy in response to emphysema.