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The aging heart and post-infarction left ventricular remodeling

Henry Shih1, Brian Lee, Randall J Lee

  • 1Department of Medicine, Division of Cardiology, University of California San Francisco, San Francisco, California 94143, USA.

Journal of the American College of Cardiology
|December 28, 2010
PubMed

Insights

Aging impairs heart cell repair after heart attacks, increasing heart failure risk in older adults. Cellular changes like reduced autophagy and stem cell function worsen outcomes in the aged heart.

Area of Science:

  • Cardiology
  • Gerontology
  • Cellular Biology

Background:

  • Aging is a significant risk factor for heart failure, a leading global cause of death.
  • Elderly patients face higher risks of myocardial infarction (MI) and subsequent heart failure compared to younger individuals.
  • Cellular aging processes in cardiomyocytes contribute to poor cardiovascular disease outcomes.

Purpose of the Study:

  • To review the cellular and molecular mechanisms of post-infarction remodeling in the aged heart.
  • To connect cellular changes with clinical outcomes in elderly patients experiencing MI.
  • To elucidate how aging impacts cardiomyocyte biology and cardiac function post-MI.

Main Methods:

  • Review of existing literature on cellular and molecular aging.
  • Analysis of age-related changes in cardiomyocyte signaling pathways.
  • Examination of impaired autophagy and apoptosis in aged cardiomyocytes.
  • Investigation of reduced cardiomyocyte renewal and stem cell function in the elderly.

Main Results:

  • Increased cellular stress and altered signaling pathways in aged cardiomyocytes.
  • Impaired autophagy due to metabolic waste accumulation, promoting apoptosis.
  • Reduced cardiomyocyte division and stem cell function contribute to cardiac dysfunction.
  • Aged hearts exhibit maladaptive remodeling responses to MI and stress.

Conclusions:

  • Cellular aging profoundly impacts the heart's ability to recover from myocardial infarction.
  • Impaired cellular repair mechanisms, including autophagy and regeneration, are key in aged hearts.
  • Understanding these cellular changes is crucial for improving clinical outcomes in elderly patients with heart failure post-MI.

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