Using ultrasound radio frequency technology to assess regression of the structure and function of the carotid artery by radioiodine therapy in hyperthyroidism patients
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Submission date: 2013-04-01
Final revision date: 2013-07-15
Acceptance date: 2013-08-16
Online publication date: 2015-12-11
Publication date: 2015-12-17
Arch Med Sci 2015;11(6):1236–1243
Introduction: The aim of the study was to investigate the structure and function of the carotid artery in patients with hyperthyroidism by ultrasound radio frequency data technology (RF data) and the effect of 131I on them.
Material and methods: Seventy patients with primary hyperthyroidism and 74 healthy volunteers were enrolled in this study. Structural and functional parameters of the common carotid artery were measured in every patient before and after 131I treatment through the RF data, such as intima media thickness (IMT), functional compliance coefficient (CC), stiffness index (), and pulse wave velocity (PWV). We also analyzed the correlation between these parameters and patients’ age, body mass index, hemodynamic parameters (blood pressure, heart rate), thyroid hormone levels and other risk factors.
Results: There was a significant difference in IMT between hyperthyroid patients and the control group at baseline (483.6 vs. 443.3 µm, p < 0.01); after treatment, the IMT decreased significantly (428.7 vs. 483.6 µm, p < 0.001). Furthermore, the IMT was correlated with patients’ age and systolic blood pressure (r = 0.525, p < 0.01 and r = 0.289, p < 0.05, respectively). The  and PWV were also higher than the control group (7.26 vs.5.87, 6.27 vs. 5.57 m/s, respectively; all p < 0.001); CC was lower than the control group (0.98 vs.1.19 mm2/KPa, p < 0.01); after treatment, PWV and were lower than baseline (5.66 vs. 6.27, 5.81 vs. 7.26 m/s, respectively; all p < 0.01), and CC was higher than baseline. In addition, they were significantly correlated with age (r = 0.525, p < 0.01 and r = 0.289, p < 0.05, respectively). However, these parameters were not correlated with the level of thyroid hormones.
Conclusions: Six-month 131I treatment for patients with hyperthyroidism reverses the structural and functional damage in the carotid artery, which is sensitively evaluated by the RF data technique.