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Related Experiment Videos

Experimental myocardial infarction in the rat: qualitative and quantitative changes during pathologic evolution.

M C Fishbein, D Maclean, P R Maroko

    The American Journal of Pathology
    |January 1, 1978
    PubMed
    Summary

    Surgical induction of myocardial infarction (MI) in rats is a cost-effective method. This study details the natural progression of MI in rats over 21 days, showing scar formation and volume reduction.

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    The Role of TGF-β in the Association Between Primary Graft Dysfunction and Bronchiolitis Obliterans Syndrome.

    American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons·2015

    Area of Science:

    • Cardiovascular Research
    • Experimental Pathology
    • Animal Models

    Background:

    • Myocardial infarction (MI) research often utilizes animal models.
    • Understanding the temporal progression of MI is crucial for therapeutic development.

    Purpose of the Study:

    • To characterize the natural history of surgically induced myocardial infarction in rats.
    • To provide quantitative data on infarct healing and resolution over 21 days.

    Main Methods:

    • Surgical occlusion of the left coronary artery in rats to induce MI.
    • Histological examination and morphometric analysis of infarcts from Day 1 to Day 21.

    Main Results:

    • A transient acute inflammatory response followed by chronic inflammation, vascular proliferation, and collagen deposition.

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  • Significant decrease in infarct volume (45.9% to 26.1%) and thickness (1.30 mm to 0.47 mm) by Day 21.
  • Infarct thinning, rather than surface area reduction, accounts for the primary volume decrease.

    • Conclusions:

    • Surgical MI induction in rats is a reliable model for studying infarct healing.
    • The study provides essential baseline data for future research on MI interventions in rats.