Effects of Hypothyroidism on Central and Peripheral Atherosclerosis in the Old Aged
Journal Title: Journal of Ankara University Faculty of Medicine - Year 2019, Vol 72, Issue 2
Abstract
Objectives: Aging is associated with an increased incidence of thyroid function abnormalities. Thyroid hormones have been shown to affect vascular hemodynamics and arterial stiffness. Arterial stiffness appears to be an essential risk factor for cardiovascular disease. The long-term effect of hypothyroidism on the development of the peripheral arterial disease is not well understood. Pulse wave velocity (PWV) is a simple, non-invasive marker of atherosclerosis that measures arterial stiffness. Ankle brachial index (ABI) is a non-invasive technique commonly used to detect peripheral vascular diseases. A limited number of studies evaluated hypothyroidism as a risk factor for both peripheral arterial disease and arterial stiffness in the old aged. We aimed to investigate this relationship in older patients and then compared with their younger counterparts. Materials and Methods: A total of 22 patients ≥65 years of age and 23 younger patients with hypothyroidism and 23 gender-matched, and body mass index-matched old aged individuals with euthyroidism as controls were enrolled in this study. Old aged patients with hypothyroidism were defined as group I, old aged individuals with euthyroidism were defined as group II, and younger patients with hypothyroidism were defined as group III. PWV was measured between the carotid and femoral arteries. ABI was measured by a handheld Doppler. Results: PWV was similar (0.36) in older groups (groups I and II) and was lower (p < 0.001) in group III. ABI measurements (left and right) were similar in all groups (p > 0.05). More than half of the patients with hypothyroidism had subclinical hypothyroidism, and this condition was similar in all groups (p = 0.26). We also compared patients with hypothyroidism (group I plus III) with older controls with euthyroidism (group II). Median age was higher in group II than that in group I plus III (p < 0.001). PWV was higher in group II than that in group I plus III (p < 0.001). Hypertension was more common in group II than in group I plus III (p < 0.001). Conclusion: We did not find a relationship between hypothyroidism and atherosclerosis in old aged. PWV and hypertension were higher in older patients with hypothyroidism than in younger. Aging and hypertension increased PWV. Studies with larger series are needed to increase the reliability of these results.
Authors and Affiliations
Volkan Atmış, Berna Evranos Öğmen, Murat Faik Erdoğan, Teslime Atlı
Keywords
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- EP ID EP549037
- DOI 10.4274/atfm.galenos.2019.70883
- Views 192
- Downloads 0
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