Atrial fibrillation is a frequent violation of a heart rhythm at thyrotoxicosis and it can determine serious complica tions (tromboembolia, stroke) and death. The study of factors increasing risk development of atrial fibrillation at thy rotoxicosis is investigating many years but the occurrence of new diagnostic methods and mathematic analysis allows to reveal new determinants of development of atrial fibrillation and its persistence after restoration of euthyreosis. In our research we’ve studied the Echocardiography parameters in 254 normotensive patients with a thyrotoxicosis Graves’ disease without any CVD and 110 patients with a subclinical thyrotoxicosis. We detected new factors of risk of atrial fibrillation: the duration of thyrotoxicosis and the left ventricular concentric hypertrophy. The contribution of different factors in development of atrial fibrillation is defined.

Results of treatment of 32 Graves disease patients with fixed activity of I131 in an outpatient mode were analyzed. 131 acitivty was 15 mCi (555 MBq). Mean age of patients was 48.5 years (20–70 years). Mean thyroid volume – 23 ± 13.9 ml. In 5 (15.6%) patients relapse of thyrotoxicosis was observed. Stable euthyroid state was revealed in 1 (3.1%) patient (follow up period 18 months). In 26 (81.3%) patients hypothyroidism occurred after the treatment. Total effectiveness of the treatment was 84.4%. In a group of patients with thyroid volume less than 50 ml total effec tiveness of the treatment was 93.1%.

Establish the prevalence of hypothyroidism among children with diabetes mellitus (DM) as a result of selective screening. During the examination period 132 children (64 f/68 m) aged from 1.0 to 17.5 years were examined. Ultrasonography evaluation, including measurement of thyroid volume, was performed in all volunteers as well as analysis of TSH, TPOAb and fT4 when TSH was out of reference range. The prevalence of overt hypothyroidism (7,6%) in the outcome of AIT in children with DM was above the population level, which confirms the effective of selective screening in this group of children and demands to its introduction into routine clinical practice; high incidence of TPOAb (12.8%) need to clarify their prognostic value having regard to longterm followup, as well as revising of dividing cutofpoint.

This article describes the case of a young woman with autoimmune polyglandular syndrome type 2, presented by the primary adrenal insufficiency and thyroid dysfunction. In the course of the disease there was a change of the thyroid functional activity from hypothyroidism to hyperthyroidism, which led to adrenal insufficiency decompensation.