Cardiac disease in the older diabetic: management considerations

Area of Science:

• Cardiology
• Gerontology
• Endocrinology

Background:

• Aging and diabetes mellitus are associated with cardiac dysfunction.
• These cardiac alterations appear independent of myocardial ischemia.
• Key changes include diminished left ventricular diastolic compliance and reduced relaxation rates.

Purpose of the Study:

• To investigate the effects of aging and diabetes mellitus on cardiac function and composition.
• To explore the mechanisms behind these cardiac alterations, particularly interstitial collagen accumulation.
• To understand the progression from subclinical abnormalities to advanced heart conditions.

Main Methods:

• Review of experimental and clinical studies.
• Analysis of cardiac function and composition in aged and diabetic subjects.
• Histological examination for interstitial collagen and small vessel disease.

Main Results:

• Both aging and diabetes mellitus reduce left ventricular diastolic compliance and relaxation rates.
• Interstitial collagen accumulation is observed in both conditions.
• While aged heart cells enlarge, this is not seen in diabetes.
• Progression to systolic dysfunction, heart failure, and arrhythmias can occur.

Conclusions:

• Aging and diabetes mellitus induce distinct but overlapping cardiac changes.
• Interstitial collagen accumulation is a key factor in diastolic dysfunction.
• Management of cardiac conditions in these patients requires cautious use of cardioactive agents.