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Related Experiment Videos

Delayed myocardial ischemia induced by anger.

R L Verrier, E L Hagestad, B Lown

    Circulation
    |January 1, 1987
    PubMed
    Summary

    This study developed an anger model in dogs, revealing that anger significantly impacts myocardial blood flow, especially in compromised coronary arteries, leading to reduced flow and ischemia.

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    Area of Science:

    • Cardiology
    • Animal Behavior Models

    Background:

    • The influence of acute emotional states on cardiovascular function is not fully understood.
    • Developing reproducible animal models for studying stress-induced cardiac responses is crucial.

    Purpose of the Study:

    • To create a reliable behavioral model simulating anger in dogs.
    • To investigate the effects of anger on myocardial blood flow in normal and stenotic coronary arteries.

    Main Methods:

    • Instrumented mongrel dogs to monitor ECG, blood pressure, and coronary blood flow.
    • Induced anger behaviorally by food access challenges.
    • Created critical coronary artery stenosis using an adjustable occluder.

    Main Results:

    • Anger significantly increased heart rate, blood pressure, and coronary blood flow in normal circulation.
    • In stenotic conditions, anger also increased these parameters but led to a subsequent 35% reduction in coronary blood flow.
    • Ischemic ST segment changes were observed post-anger in stenotic conditions.

    Conclusions:

    • The developed anger model effectively impacts cardiovascular and coronary hemodynamics.
    • Anger can precipitate myocardial ischemia in the setting of coronary artery stenosis.
    • Emotional stress is a significant factor in cardiovascular events, particularly in compromised coronary circulations.

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