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Related Experiment Videos

Valvular calcification in the elderly: possible pathogenic factors.

A Pomerance1, A J Darby, H M Hodkinson

  • 1Histopathology Dept., Mt. Vernon Hospital, Northwood, Middlesex.

Journal of Gerontology
|September 1, 1978
PubMed
Summary
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Mitral ring calcification is linked to aging, female sex, and larger heart size in older adults. These factors suggest mechanical stress, not mineral changes, drives this condition.

Area of Science:

  • Geriatric Medicine
  • Cardiovascular Pathology
  • Biomaterials Science

Background:

  • Calcification of cardiac structures, such as the mitral ring and aortic valve, is a common finding in elderly populations.
  • The underlying mechanisms and risk factors for valvular and annular calcification are not fully understood.
  • Previous research has explored associations with age, sex, and metabolic factors.

Purpose of the Study:

  • To investigate the prevalence and potential correlates of mitral ring calcification and aortic valve calcification in an unselected elderly autopsy cohort.
  • To examine the relationship between cardiac calcification and demographic, hemodynamic, and biochemical factors.
  • To elucidate the etiological factors contributing to mitral ring calcification versus aortic valve calcification.

Main Methods:

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  • Retrospective autopsy study of 219 patients aged over 60 years.
  • Systematic examination for calcification of the mitral ring and aortic valve cusps.
  • Correlation analysis with clinical data including age, sex, heart size, blood pressure, bone density, and serum mineral levels (calcium, phosphate, alkaline phosphatase).

Main Results:

  • Aortic valve calcification showed a weak association with advanced age but no other significant correlations.
  • Mitral ring calcification was significantly associated with increased age, being female, and increased heart weight (corrected for body size).
  • No significant associations were found between either type of calcification and serum calcium, phosphate, or alkaline phosphatase levels.

Conclusions:

  • Mitral ring calcification in the elderly appears to be primarily driven by mechanical factors, such as increased heart weight, rather than alterations in mineral metabolism.
  • Aortic valve calcification has a weaker association with age and lacks significant correlations with the examined factors.
  • Further research into biomechanical influences is warranted to understand the pathogenesis of mitral annular calcification.