Cardiomyopathy of the aging human heart. Myocyte loss and reactive cellular hypertrophy
| Autor: | Giorgio Olivetti, Piero Anversa, J M Capasso, Massimo Melissari |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Adult
Male Senescence Aging medicine.medical_specialty Programmed cell death Adolescent Physiology Heart Ventricles Cardiomyopathy Muscle hypertrophy Internal medicine Humans Medicine Myocyte Aged Aged 80 and over Cell Nucleus business.industry Myocardium Body Weight Ventricular wall Human heart Hypertrophy Organ Size Middle Aged medicine.disease Endocrinology Circulatory system Female Cardiomyopathies Cardiology and Cardiovascular Medicine business |
| Zdroj: | Circulation Research. 68:1560-1568 |
| ISSN: | 1524-4571 0009-7330 |
| DOI: | 10.1161/01.res.68.6.1560 |
| Popis: | To determine the effects of aging on the human myocardium, 67 hearts were obtained from individuals who died from causes other than cardiovascular disease. The age interval examined was 17-90 years. Regression analysis demonstrated that the aging process was characterized by a loss of 38 million and 14 million myocyte nuclei/yr in the left and right ventricular myocardium, respectively. This loss in muscle mass was accompanied by a progressive increase in myocyte cell volume per nucleus in both ventricles. Left ventricular myocytes enlarged by 110 microns3/yr, whereas right ventricular myocytes increased by 118 microns3/yr, resulting in a preservation of ventricular wall thickness. However, the cellular hypertrophic response was unable to maintain normal cardiac mass. Left and right ventricular weights decreased by 0.70 and 0.21 g/yr, respectively. In conclusion, loss of cells and enlargement of the remaining myocytes may represent the structural basis for the reduced compensatory capacity of the aged heart and together may contribute to the development of myocardial dysfunction and failure in the elderly. |
| Databáze: | OpenAIRE |
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