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Carotid Beta Stiffness Association with Thyroid Function
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DOI：10.3390/jcm10030420.png)
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Background: Thyroid hormone modulation of cardiovascular function has been associated with cardiovascular disease. Recent evidence suggests that free thyroxine (FT4) levels are associated with an increase in systemic arterial stiffness, but little is known about the effects of FT4 at the local level of the common carotid artery. beta-stiffness index is a local elastic parameter usually determined by carotid ultrasound imaging. Methods: We conducted a cross-sectional analysis in the ProgeNIA cohort, including 4846 subjects across a broad age range. For the purpose of this study, we excluded subjects with increased thyrotropin (TSH) levels and those treated with levothyroxine or thyrostatic. We assessed beta stiffness, strain, wall-lumen ratio, carotid cross-sectional area (CSA), and stress and flow in the right common carotid artery. We tested whether FT4, heart rate, and their interactions were associated with carotid parameters. Results: FT4 was positively and independently associated with beta stiffness index (beta = 0.026, p = 0.041), and had a negative association with strain (beta = -0.025, p = 0.009). After adding heart rate and the interaction between FT4 and heart rate to the model, FT4 was still associated with the beta stiffness index (beta = 0.186, p = 0.06), heart rate was positively associated with the stiffness index (beta = 0.389, p < 0.001) as well as their interaction (beta = 0.271, p = 0.007). Conclusion: This study suggests that higher FT4 levels increase arterial stiffness at the common carotid level, consistent with a detrimental effect on elastic arteries. The effect of FT4 is likely to be primarily attributable to its effect on heart rate.
Keyword:
thyroxine
carotid beta stiffness
aging
carotid strain
thyroid hormone
heart rate
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2.9
论文数:
5.1W
被引数:
9.8W
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