Thyrotoxicosis in institutionalized elderly patients with atrial fibrillation

Area of Science:

• Gerontology
• Endocrinology
• Cardiology

Background:

• Atrial fibrillation is a common arrhythmia in older adults.
• Hyperthyroidism is a potential, though often overlooked, contributor to cardiac arrhythmias.
• Aging is associated with increased prevalence of other cardiac conditions that can cause atrial fibrillation.

Purpose of the Study:

• To investigate the prevalence of hyperthyroidism as a cause of atrial fibrillation in elderly individuals residing in a nursing home.
• To determine if there is an association between hyperthyroidism and atrial fibrillation in this population, considering sex differences.

Main Methods:

• Cardiac rhythm and thyroid status were assessed in 316 patients over 65 years old.
• Patients were residents of a nursing home.
• Prevalence of hyperthyroidism was compared between patients with and without atrial fibrillation.

Main Results:

• Hyperthyroidism was identified in 11% of elderly men and 31% of elderly women with atrial fibrillation.
• The prevalence of hyperthyroidism in elderly patients without atrial fibrillation was 1.7%.
• A statistically significant association was found between atrial fibrillation and hyperthyroidism in elderly women, but not in men.

Conclusions:

• Hyperthyroidism is a prevalent condition among institutionalized elderly women with atrial fibrillation.
• Thyroid status evaluation is crucial in older women presenting with atrial fibrillation.
• Further research may be warranted to explore sex-specific mechanisms linking hyperthyroidism and atrial fibrillation in the elderly.