Abstract
The aim of the study was to assess function of cardiovascular system in patients with subclinical hyperthyroidism (SH). We studied 30 women with SH in the age of 40-75 yr, and 20 euthyroid subjects. The average daytime systolic blood pressure was significantly higher in patients than in controls. The patients with SH had increase of average heart rate compared with the control group. The Doppler echocardiography showed that diastolic function was significantly impaired. To assess the thyroid function we studied medical history of 107 patients with atrial fibrillation. The prevalence of thyrotoxicosis in patients with atrial fibrillation was higher than in subjects without them. Serum level TSH level should be measured in all patients with atrial fibrillation.
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