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Updated: Dec 21, 2025

Scanning Electron Microscopy of Macerated Tissue to Visualize the Extracellular Matrix
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Cardiac tissue remodeling in healthy aging: the road to pathology

Evan Tracy1, Gabrielle Rowe1, Amanda J LeBlanc1

  • 1Department of Physiology, Cardiovascular Innovation Institute, University of Louisville, Louisville, Kentucky.

American Journal of Physiology. Cell Physiology
|May 21, 2020
PubMed

Insights

Healthy aging hearts undergo normal physiological remodeling, affecting contractility and vessels. These changes limit tissue repair during heart disease, but new therapies may help aging hearts.

Area of Science:

  • Cardiovascular Physiology
  • Gerontology
  • Cardiac Pathophysiology

Background:

  • Aging hearts exhibit specific physiological remodeling processes.
  • These age-related changes impact cardiac function and tissue plasticity.
  • Understanding normal aging is crucial for addressing heart disease in older adults.

Purpose of the Study:

  • To review the normal physiological remodeling in healthy aging hearts.
  • To examine how these changes affect the heart's response to disease.
  • To identify at-risk populations and discuss therapeutic strategies for aging hearts.

Main Methods:

  • Literature review of studies on cardiac aging.
  • Analysis of physiological changes in contractility, conduction, and vasculature.
  • Synthesis of information on extracellular matrix remodeling.
  • Review of pathophysiological states like myocardial ischemia and heart failure in aging.

Main Results:

  • Normal aging involves significant remodeling of cardiac contractility, conduction, valves, coronary vessels, and extracellular matrix.
  • These age-related adaptations reduce the heart's plasticity and remodeling capacity.
  • This decreased plasticity exacerbates outcomes in conditions such as myocardial ischemia and heart failure.

Conclusions:

  • Age-related cardiac remodeling provides a foundation for reduced tissue repair in disease.
  • Identifying individuals susceptible to poor remodeling is key.
  • Therapeutic strategies are emerging to improve dysfunctional remodeling in aging hearts.

Keywords:
agingcardiacremodeling

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