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Related Concept Videos

Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...

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Related Experiment Video

Updated: Jun 2, 2026

Ultrasonic Assessment of Myocardial Microstructure
10:53

Ultrasonic Assessment of Myocardial Microstructure

Published on: January 14, 2014

[Myocardial structural changes in acute left ventricular overload in an experiment].

M L Blagonravov, V A Koviazin, A Iu Korshunova

    Arkhiv Patologii
    |April 22, 2011
    PubMed
    Summary

    Acute left ventricular (LV) overload in rabbits induced significant cardiomyocyte apoptosis and myocardial tissue destruction. This study quantizes the cellular damage and cell death following simulated LV overload.

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    Published on: April 8, 2013

    Area of Science:

    • Cardiovascular Science
    • Pathology
    • Cell Biology

    Context:

    • Acute left ventricular (LV) overload is a critical condition affecting cardiac function.
    • Understanding the cellular mechanisms of myocardial injury is crucial for developing therapeutic strategies.
    • Previous research has explored the effects of pressure overload, but acute overload models offer unique insights.

    Purpose:

    • To investigate the morphological and cellular changes in the left ventricular myocardium following acute hemodynamic overload.
    • To quantify cardiomyocyte apoptosis using both morphometric analysis and immunohistochemical techniques (TUNEL assay).
    • To establish a rabbit model for studying acute LV overload and its associated myocardial damage.

    Summary:

    • Acute left ventricular overload was simulated in rabbits by constricting the ascending aorta.
    • Myocardial tissue sections were analyzed using light microscopy, morphometry, and TUNEL staining to assess cardiomyocyte apoptosis.
    • Results indicated significant myocardial tissue destruction, reduced viable myofibrils, and increased cardiomyocyte apoptosis.

    Impact:

    • This study provides quantitative data on the cellular response to acute LV overload.
    • The findings highlight the rapid onset of cardiomyocyte apoptosis and tissue damage.
    • The established model can be utilized for further research into acute cardiac injury and potential interventions.