Presence Of Subclinical Hypothyroidism Research Articles

The influence of thyroid status on long-term complications after stenting in patients with acute coronary syndrome without ST-segment elevation.

Backround. It is known that both subclinical hypothyroidism (SHT) and subclinical thyrotoxicosis (STT) can influence the outcome of coronary heart disease. The feasibility of routinely determining thyroid status in patients without obvious signs of thyroid dysfunction with acute coronary syndrome without ST-segment elevation (NSTEACS) to assess the effect on the status of implanted stents has not been determined.Objective. To evaluate the effect of subclinical hypothyroidism and subclinical thyrotoxicosis on lumen loss and the degree of endothelialization of drug-eluting stents after stenting for NSTE-ACS. Design and methods. The study included 173 patients who were urgently stented for NSTE-ACS, and who subsequently underwent repeat coronary angiography within a year on a planned or emergency basis with a targeted assessment of the condition of the installed stents. In 40 patients with everolimus-eluting stents, the condition of the coronary arteries was assessed 6.3 + 0.3 months after stenting using optical coherence tomography (OCT). All patients included in the study had their thyroid status assessed.Results. SHT was detected in 8 (21.6 %) patients with loss of lumen in the stent area and in 26 (19.1 %) patients without loss of lumen, p = 0.73. STT was detected in 2 (5.4 %) and 3 (2.2 %) patients, respectively, p = 0.30. A prognostic analysis performed by logistic regression with forced inclusion as predictors of lumen loss identified the parameters Syntax Score I, stent diameter, and the number of affected coronary arteries. No effect of thyroid status on lumen loss was found. In patients with subclinical hypothyroidism, OCT data revealed insufficient endothelialization of everolimus-eluting stents 6 months after stenting for NSTE-ACS. The percentage of uncovered stent struts depended on TSH levels (r = 0.42, p = 0.007). The higher the TSH level, the higher the healing index and the worse the stent endothelialization (r = 0.37, p = 0.016). Conclusion. Thus, routine determination of thyroid status indicators in patients with NSTE-ACS in order to identify subclinical thyroid dysfunction does not provide significant prognostic information regarding the risk of lumen loss of implanted stents. Considering the potential risk of thrombotic complications associated with insufficient endothelialization of everolimus-eluting stents in the presence of subclinical hypothyroidism, it seems advisable to identify it when deciding on de-escalation of antithrombotic therapy. The question remains open about the need to correct the parameters of subclinical thyroid dysfunction in order to modify the prognosis.

Гормональные, биохимические показатели и уровни микроэлементов крови у молодых женщин с субклиническим гипотиреозом в сочетании с носительством антител к тиреопероксидазе

Many studies have been devoted to investigating the relationship between subclinical hypothyroidism (SH), thyroid gland (TG) autoimmunity, and blood trace elements; however, the data presented in these studies are often contradictory. Aim of study. To identify the factors associated with SH in combination with the presence of Anti-thyroid peroxidase antibody (TPO-Ab). Design. Single-center, observational, single-cohort, cross-sectional, and uncontrolled study. Materials and Methods. This study analyzed 859 women aged 18–45 with SH and without TG dysfunction. Based on thyroid function and TPO-Ab status (presence (+) or absence (–)), four study groups were formed: Group 1 — Euthyroidism and TPO-Ab(–) (n = 503); Group 2 — Euthyroidism and TPO-Ab(+) (n = 164); Group 3 — SH and TPO-Ab(–) (n = 128); Group 4 — SH and TPO-Ab(+) (n = 64). Determination of thyroid-stimulating hormone (TSH), free thyroxine (FT4), and TPO-Ab levels in serum was provided by enzyme immunoassay on the Evolis Robotized System using the test systems "Thyroid-ELISA-TSH, 0.23–3.4 µIU/ml", "Thyroid-ELISA FT4, 10–23.2 pmol/l", and "Thyroid ELISA-TPO-Ab < 30 U/ml". The reference values were taken from the instructions of the manufacturer Alkor Bio Group (Russia). Measurement of element concentrations was conducted on the atomic absorption spectrometer "МГА-915МД" from Lumex (Russia). Logistic regression analysis with a series of univariate and multivariate models was performed to determine independent predictors of the likelihood of SH and TPO-Ab positive status (relative to euthyroid and TPO-Ab negative individuals). Results. In young women, a decrease in FT4 is associated with increasing age, elevated levels of TSH, TPO-Ab, mercury, decreased heart rate, and reduced levels of thyroglobulin, alkaline phosphatase (ALP), manganese, nickel, selenium, lead, and the triglyceride/glucose index. An increase in TSH is associated with lower levels of ALP, manganese, and nickel, and higher mercury levels. The likelihood of having SH combined with the presence of TPO-Ab, compared to the group without thyroid dysfunction and elevated antibodies, increases with reduced concentrations of iodine (odds ratio (OR) = 0.739; 95% confidence interval (CI): 0.618–0.884, p = 0.001), selenium (OR = 0.987; 95% CI: 0.976–0.998, p = 0.018), and zinc (OR = 0.998; 95% CI: 0.997–0.999, p = 0.023), and with elevated lead levels (OR = 1.106; 95% CI: 1.006–1.217, p = 0.038). In a multivariate regression model, the probability also increases with decreased iodine and cadmium levels, and elevated lead levels. Conclusion. Reduced concentrations of iodine, selenium, and zinc, along with elevated blood lead levels, are factors associated with the activation of thyroid autoimmunity and the presence of SH in combination with elevated TPO-Ab levels. Keywords: thyroid gland, thyroid function hormones, microelements, thyroid peroxidase antibodies, young age, women.

Активность теломеразы, гиперлипидемия и особенности атеросклеротического поражения брахиоцефальных артерий у бессимптомных пациентов трудоспособного возраста с субклиническим гипотиреозом

Aim. To study telomerase activity, lipidemia and to assess the severity of atherosclerotic lesions of the brachiocephalic arteries in asymptomatic patients of working age with subclinical hypothyroidism. Design. A cross-sectional cohort study. Materials and methods. Data on 131 patients of working age (32 men and 99 women) with different hormonal status of the thyroid gland (thyroid) without clinical signs of chronic cerebral circulatory insufficiency were analyzed. Based on the assessment of the hormonal status of the thyroid gland, 2 groups of patients were formed: 87 with laboratory-confirmed hypertension (thyroid-stimulating hormone level > 4.0 mMU/l with normal characteristics of free fractions of thyroid hormones) and 44 patients without thyroid dysfunction. The groups formed were comparable in age, gender composition, presence and severity of hypertension, aggravated family history of early cardiovascular events, and smoking. All patients underwent ultrasound examination of the brachiocephalic arteries, determination of the lipid spectrum and telomerase concentration. The processing of the obtained data was carried out using statistical packages Excel, Statistica v. 10.0. The data obtained were interpreted as reliable, and the differences between the indicators were considered significant when the error-free prediction value was equal to or greater than 95% (p < 0.05). Results. In the group of people with hypothyroidism, the proportion of people with multivessel atherosclerotic lesion was higher (34.5% (n = 30) vs. 13.6% (n = 6) (χ2 = 6.37; p < 0.05)), one or a combination of several signs of instability of atherosclerotic plaque (41.4% (n = 36) vs. 18.2% (n = 8) (χ2 = 7.05; p < 0.01)). In patients with subclinical hypothyroidism, precerebral atherosclerosis occurs against the background of atherogenic type IIa secondary hyperlipidemia (67.8% (n = 59) vs. 34.1% (n = 6) (χ2 = 13.52; p < 0.001) in combination with insufficiency of antiatherogenic high density lipoproteins (74.7% (n = 65) vs. 45.5% (n = 20) (χ2 = 10.98; p < 0.001)), lower values of telomerase concentration in comparison with the group of people without thyroid dysfunction: (8.2 (7.4–9.5) vs. 10.8 (10.1–12.2) ng/ml (p < 0.001)). The relationship between the level of telomerase activity (r = –0.72; p < 0.05) and the presence of subclinical hypothyroidism, atherosclerotic lesions of the precerebral bed in patients (r = –0.33; p < 0.05) was established. Conclusion. In clinically healthy patients of working age with newly diagnosed, medically uncorrected subclinical hypothyroidism, the proportion of persons with ultrasound signs of multivessel atherosclerotic lesions of the brachiocephalic arteries is higher, and precerebral atherosclerosis occurs against the background of atherogenic type IIa secondary hyperlipidemia in combination with insufficiency of antiatherogenic high density lipoproteins, lower values of telomerase activity in comparison with the group of persons without thyroid dysfunction. Etiopathogenetic mechanisms of "early vascular aging", the criteria for stratification of risk groups for atherosclerosis-associated cardiovascular disease, the choice of diagnostic algorithms for visualizing preclinical stages of atherogenesis, and timely antiatherogenic tactics in asymptomatic patients with comorbid thyroid pathology require further study. Verification of a stenosing hemodynamically significant or non-hemodynamically significant atherosclerotic lesion of the coronary basin, regardless of the clinical component, is a factor of high cardiovascular risk requiring immediate correction of hyperlipidemia. Keywords: thyroid gland, hypothyroidism, hyperlipidemia, atherosclerosis, precerebral (brachiocephalic) arteries, telomerase activity, comorbid pathology.

Subclinical hypothyroidism and its relationship with therapy failure in patients underwent cardiac resynchronization therapy.

Cardiac resynchronization therapy (CRT) is used in patients with heart failure (HF), an important problem in cardiology practice, with reduced left ventricular systolic dysfunctions and left ventricular dyssynchrony to improve morbidity and mortality. Thyroid diseases have undeniable effects on cardiac functions. So, we aimed to evaluate the effect of subclinical hypothyroidism on CRT response in HF patients in this study. After the exclusion, 386 consecutive patients who received first-time CRT-defibrillator (CRT-D) or CRT-pacemaker (CRT-P) were retrospectively included. Known overt hypothyroidism or hyperthyroidism patients were excluded. The response of CRT was defined as a relative increase (≥15%) or absolute increase (≥10%) in left ventricular ejection fraction (LVEF) from implantation to one-year after follow-up. Diabetes mellitus, atrial fibrillation and coronary artery disease ratios were similar between responder vs. non-responder groups. Thyroid stimulating hormone (TSH) levels were higher (p <0.005) in non-responder group. Responder group had higher baseline LVEF (p <0.001), and follow-up LVEF (p <0.001) and longer baseline QRS interval (p =0.004), but similar post-implant QRS interval duration (p >0.005) with non-responder group. Baseline QRS interval (p =0.002), baseline LVEF (p <0.001) and the presence of subclinical hypothyroidism (SCH) (p =0.001) were independent predictors of CRT response. Adding SCH as a risk factor to our baseline risk modelling has an independent prognostic impact to predict non-responder patients (p =0.01). Presence of the SCH may be an important predictor of non-response in patients undergoing CRT. Evaluating the risk factors associated with non-response to CRT may be logical in identifying patients who obtain maximum benefit from CRT treatment.

Does presence of subclinical hypothyroidism and thyroid auto antibodies affect pregnancy outcomes in pregnancy? A record-based cross-sectional study

ObjectiveOur aim in this study is to determine the relationship between TPOAb positivity and pregnancy outcomes in the subclinical hypothyroid patient group. Materials and methodsThis study was started with 21,321 pregnant women, but after the exclusion criteria, 11,387 pregnant women were included int his study. Demographic characteristics of each patient group included in the study, such as age, bodymass index (BMI), and laboratory parameters such as complete blood count (hemogram), liver and kidney function tests, type of delivery, birth weight, neonatal intensive care admission, 1st and 5th minute APGAR scores, glucose tolerance test results, whether there was high blood pressure during pregnancy, whether there was premature rupture of membranes were recorded from the hospital information system and patient files. ResultsPregnant women with subclinical hypothyroidism were divided into groups according to their TPOAb status. When maternal and neonatal outcomes were evaluated between groups; Among these four groups there was a statistically significant difference only in impaired glucose tolerance (IGT) antibody groups with and without subclinical hypothyroidism according to their positivity (p < 0.01). When the euthyroid TPOAb negative group was taken as reference, the risk of impaired and TPOAb positive groups (OR: 1.210; 95% CI: 0.936–1.563; P = 0.145), impaired in the group with subclinical hypothyroidism but TPOAb positivity glucose tolerance 1.358(OR: 1.358); 95% CI: 1.042–1.770; P = 0.023) fold increased by 3.556 (OR: 3.556) in the group with subclinical hypothyroidism and TPOAb positivity; (95% CI: 2.37–5.343; p < 0,001). ConclusionIn ourstudy, there was a significant difference only in terms of IGT between the Groups with and without subclinical hypothyroidism, depending on whether they were positive for TPOAb or not. Therefore, studies in volving larger patient groups are needed.

Relation Between URIC Acid Levels and Subclinical Hypothyroidism in Diabetic Patients.

Subclinical hypothyroidism (SCH) is frequently seen in diabetic patients. Elevated levels of uric acid (UA) were also reported in diabetic patients. No study assessed the relation between SCH and UA levels in diabetic patients. We aimed to evaluate this relation and the association of both conditions with other clinical and laboratory parameters in diabetic patients. This cross-sectional study included 100 T2DM patients in addition to 50 age and sex matched healthy controls. Diabetic patients comprised 50 patients with SCH and 50 euthyroid patients. All participants were subjected to careful history taking, thorough clinical examination and standard laboratory work up. The performed investigations included fasting and postprandial blood sugar, fasting insulin levels, HbA1c levels, thyroid hormones (FT3, FT4 and TSH), renal profile and serum UA. Comparison between the studied groups regarding serum UA levels revealed significantly higher levels in the diabetic group (5.4 ± 1.9 versus 4.2 ± 1.0 mg/dl, p<0.001). SCH + DM patients had significantly higher UA levels in comparison to DM group (6.1 ± 1.8 versus 4.8 ± 1.7 mg/dl, p<0.001) and control group (6.1 ± 1.8 versus 4.2 ± 1.0 mg/dl, p<0.001). SCH + DM patients had significantly higher HbA1c levels (8.9 ± 1.1 versus 7.6 ± 1.3%, p<0.001), HOMA-IR (3.9 ± 0.8 versus 2.8 ± 1.0, p<0.001) and UA levels (6.1 ± 1.8 versus 4.8 ± 1.7, p<0.001). Correlation analysis identified a significant direct correlation between serum UA and HOMA-IR in DM + SCH patients (r=0.4,p=0.004). In univariate analysis, presence of SCH [OR (95% CI): 2.57 (1.07-6.15), p=0.034] and nephropathy [OR (95% CI): 4.57 (1.77-11.8), p=0.002] was significant predictors of higher (upper tertile) UA in the studied patients. However, in multivariate analysis, only nephropathy [OR (95% CI): 4.25 (1.62-11.17), p=0.003] continued to be significant while SCH showed a marginal trend [OR (95% CI): 0.43 (0.17-1.08), p=0.073]. The present study suggests an association between SCH and increased UA levels in diabetic patients.

Thyroid and pituitary-adrenal activity in patients with asthma and endemic subclinical hypothyroidism in response of respiratory tract to a cold stimulus

Introduction. In patients with uncontrolled asthma, the stress-induced production of glucocorticosteroids in response to a cold bronchoprovocation test is increased, which is associated with an increase in the level of thyroidstimulating hormone (TSH), characteristic of the syndrome of subclinical hypothyroidism (SH). The peculiarities of thyroid hormone metabolism and changes in pituitary-adrenal homeostasis that develop in asthma in a goiter-endemic region under the influence of cold stress factors on the respiratory system are poorly studied.Aim. To assess the activity of the pituitary-thyroid and pituitary-adrenal systems in response to bronchoprovocation with cold air in asthma patients with cold airway hyperresponsiveness (CAHR) and SH living in conditions of goiter endemic in the Amur Region.Materials and methods. In 34 asthma patients with CAHR, without symptoms of thyroid diseases, the level of disease control was assessed using the Asthma Control Test (ACT) questionnaire. Lung function and airway reaction to a cold stimulus (ΔFEV1IHCA) during 3-minute isocapnic hyperventilation with cold (-20ºC) air (IHCA) were measured. Methods of immunological diagnostics in the blood of patients before and after the IHCA test were used to measure the concentrations of thyroid-stimulating (TSH) and adrenocorticotropic (ACTH) hormones, common and active forms of thyroxine (T4) and triiodothyronine (T3), thyroglobulin (TG), autoantibodies to thyroperoxidase (AB-TPO), cortisol. The content of cyclic adenosine monophosphate (cAMP) was determined in leukocytes.Results. The patients were divided into two groups: group 1 included 25 patients with an initially low (&lt;4.0) TSH level (2.39±0.18 mU/L), group 2 included 9 patients with an initially high (&gt;4, 0) TSH level (4.80±0.46 mU/L, p&lt;0.0001). The ACT control level in groups 1 and 2 was 16.6±1.0 and 15.3±1.5 points (p&gt;0.05), base FEV1 was 95.8±3.3 and 81.0±5.4% (p=0.026), ΔFEV1IHCA -11.9±0.96 and -13.5±2.7 (p&gt;0.05), respectively. In group 1, in response to IHCA, the level of free T4 increased from 14.2±0.70 to 15.2±0.71 pmol/L (p&lt;0.05), free T3 from 3.73±0.24 to 4.15±0.21 nmol/L (p&lt;0.05). In group 2, a lower level of free T4 was recorded, both before (12.2±1.52 pmol/L) and after IHCA (11.6±1.60 pmol/L, p=0.041). In addition, in group 2 patients, the cortisol concentration at baseline and after IHCA (516.6±31.6 and 397.4±40.4 nmol/L, p&lt;0.05) was significantly lower than in group 1 (628.3±27.5 and 608.3±34.1 nmol/L, p=0.042; p=0.002, respectively). A close correlation was found between ΔFEV1 and the T4 level before (r=0.54; p&lt;0.01) and after the test (r=0.41; p&lt;0.05), with the amount of cAMP up to (r=0.58; p=0.008) and after the test (r=0.47; p=0.009), as well as the correlation between ΔМEF50 and the initial level of cortisol in the blood serum (r=0.50; p=0.002).Conclusion. In asthma patients with CAHR living in the region of cold climate and goiter endemic, the presence of SH can be considered as a prognostic sign of the development of dysadaptation of the respiratory system to cold exposure.

Значення латентної внутрішньоклітинної інфекції у формуванні автоімунного тиреоїдиту в жінок із синдромом полікістозних яєчників

Актуальність. Встановлюються механізми, що пов’язують латентну внутрішньоклітинну інфекцію з автоімунними процесами, для удосконалення профілактики автоімунних захворювань. Мета: визначення частоти латентної хламідійної та герпесвірусної інфекції в жінок із синдромом полікістозних яєчників (СПКЯ) та її зв’язку з наявністю автоімунного тиреоїдиту (АІТ), порушеннями тиреоїдної функції та рівнями статевих гормонів. Матеріали та методи. У 55 жінок віком 18–24 роки із СПКЯ досліджено рівні загального тестостерону, прогестерону, естрадіолу, тиреотропного гормону, тироксину вільного, антитіл до тиреоїдної пероксидази, хламідій та вірусу простого герпесу 1-го та 2-го типів, проведено сонографію щитоподібної залози. Контрольну групу становили 20 здорових жінок того ж віку. Результати. У 21 жінки із СПКЯ спостерігався АІТ у стані еутиреозу та при підвищенні рівнів антитіл до тиреоїдної пероксидази; у 14 жінок на тлі АІТ розвинувся субклінічний гіпотиреоз; в інших 20 хворих на СПКЯ тиреоїдної патології не виявлено. Рівні тестостерону були вірогідно вищими, а естрадіолута прогестерону — вірогідно нижчими, ніж у контрольній групі. Підвищення рівнів антитіл до хламідій (&gt; 1,1 ОД) встановлено в 9,5 % у групі з АІТ з еутиреозом, у 7,1 % — за наявності субклінічного гіпотиреозу на тлі АІТ та в 5,0 % — за відсутності АІТ. Вірогідної різниці між цими підгрупами не встановлено. Антитіла до вірусу простого герпесу були підвищені в 57,1; 64,3, 30,0 % хворих із СПКЯ відповідно й лише у 20 % жінок із групи контролю. Висновки. Наявність латентної герпесвірусної інфекції у молодих жінок із СПКЯ може бути чинником ризику розвитку АІТ. У жінок у постменопаузальному періоді дисбаланс естрогенів і прогестерону також може створити умови для формування АІТ.

Frequency of Subclinical Hypothyroidism in Old-age Population.

This study was conducted to determine the frequency of subclinical hypothyroidism (SCH) in the old age population (>60 years). A cross-sectional study was conducted from July 2019 to January 2020 at Jinnah Postgraduate Medical Centre, Karachi, Pakistan. Healthy subjects (having no active complaint) of either sex aged 60-80 years were included. Those already on thyroid replacement, preexisting thyroid diseases, prior radiation therapy, or having chronic kidney disease were excluded. A total of 133 participants, 79 males and 54 females, were selected with a mean age of 69.5 ± 6.4 years. There were 29 diabetics, 30 hypertensives, and 10 smokers. A total of 17 (12.8%) were found to have SCH. On stratification, gender, diabetes mellitus, and hypertension had a significant association with the presence of SCH. SCH is a modifiable risk factor, more in females, diabetics, hypertensives, and the old age population. These results highlight the need for screening for SCH in primary care settings, especially in old age. Key Words: Subclinical hypothyroidism, Old age, Gender, Diabetes, Hypertension.

Abstract 15486: Subclinical Hypothyroidism and Left Heart Strain in the General Population

Background: Although subclinical hypothyroidism (SCH) is a common clinical entity and carries independent risk for incident heart failure (HF), its possible association with subclinical cardiac dysfunction has not been extensively evaluated. Left ventricular global longitudinal strain (LVGLS) and left atrial (LA) phasic strain can unmask subclinical left heart dysfunction and are excellent predictors for HF. This study aimed to investigate the association between the presence of SCH and subclinical left heart dysfunction in a sample of the general population without overt cardiac disease. Methods: We examined 1,078 participants who underwent extensive cardiovascular health check-up including laboratory tests and 2-dimensional speckle-tracking echocardiography to assess LVGLS and LA reservoir, conduit and pump strain. SCH was defined as an elevated serum thyroid stimulating hormone level with normal concentration of free thyroxine. Results: Mean age was 62±12 years, and 56% were men. Seventy-eight (7.2%) participants exhibited SCH. Individuals with SCH had significantly reduced LA reservoir and conduit strain (both p&lt;0.05) compared with those with euthyroidism, whereas there was no significant difference in LV ejection fraction, LA volume index, LVGLS and LA pump strain between the 2 groups. In multivariable analyses, the presence of SCH was significantly associated with impaired LA reservoir strain, independent of age, traditional cardiovascular risk factors and pertinent laboratory and echocardiographic parameters including LVGLS. Conclusions: In an unselected community-based cohort, individuals with SCH had significantly impaired LA function. This association may be involved in the higher incidence of HF in subjects with SCH.

Increased prevalence of subclinical hypothyroidism in female hospitalized patients with depression.

Sex differences in depressive disorder (DD) and subclinical hypothyroidism (SCH) have been well recognized. However, few studies focus on the sex differences in DD patients with SCH. The purpose of this study is to address the sex differences in DD inpatients with SCH and further investigate the clinical characteristics and associations between DD and SCH among female and male depressed inpatients. A total of 1787 hospitalized patients with a diagnosis of DD were recruited. Depression was assessed using the Hamilton Depression Rating Scale-17 items (HAMD), and anxiety was assessed using the Hamilton Anxiety Rating Scale. Blood test, including serum thyroid hormone levels, was measured. According to different genders, associations between DD and the presence of SCH were estimated using binary logistic regression. In the 1787 hospitalized patients with DD, the prevalence of SCH was 11.8%; the prevalence of SCH in female depressed inpatients is approximately two times that of male inpatients (14.6 vs. 7.4%, P < 0.05). Logistic regression showed that recurrent episodes and high BMI were associated with SCH in female inpatients (both P < 0.05). Spearman correlation analysis showed that thyroid stimulating hormone levels were associated with BMI (P < 0.05), total cholesterol levels (P < 0.05), and low-density lipoprotein cholesterol levels (P < 0.05) in female inpatients. Our present study showed that the prevalence of SCH among female hospitalized patients with depression is approximately two times that of male inpatients. Recurrent and high-BMI female depressed inpatients are at high risk to develop SCH. More attention should be paid to the thyroid function of female inpatients with DD in future clinical work.

Subclinical Hypothyroidism as an Independent Determinant of Left Atrial Dysfunction in the General Population.

Although subclinical hypothyroidism (SCH) is a common clinical entity and carries independent risk for incident heart failure (HF), its possible association with subclinical cardiac dysfunction is unclear. Left ventricular global longitudinal strain (LVGLS) and left atrial (LA) phasic strain can unmask subclinical left heart abnormalities and are excellent predictors for HF. This study aimed to investigate the association between the presence of SCH and subclinical left heart dysfunction in a sample of the general population without overt cardiac disease. We examined 1078 participants who voluntarily underwent extensive cardiovascular health check-ups, including laboratory tests and 2-dimensional speckle-tracking echocardiography to assess LVGLS and LA reservoir, conduit, and pump strain. SCH was defined as an elevated serum thyroid-stimulating hormone level with normal concentration of free thyroxine. Mean age was 62 ± 12 years, and 56% were men. Seventy-eight (7.2%) participants exhibited SCH. Individuals with SCH had significantly reduced LA reservoir (37.1 ± 6.6% vs 39.1 ± 6.6%; P = 0.011) and conduit strain (17.3 ± 6.3% vs 19.3 ± 6.6%; P = 0.012) compared with those with euthyroidism, whereas there was no significant difference in left ventricular ejection fraction, LA volume index, LVGLS, and LA pump strain between the 2 groups. In multivariable analyses, SCH remained associated with impaired LA reservoir strain, independent of age, traditional cardiovascular risk factors, and pertinent laboratory and echocardiographic parameters. including LVGLS (standardized β -0.054; P = 0.032). In an unselected community-based cohort, individuals with SCH had significantly impaired LA phasic function. This association may be involved in the higher incidence of HF in subjects with SCH.

Subclinical hypothyroidism in pediatric nephrotic syndrome: the correlations with albumin, globulin, and proteinuria

Background Nephrotic syndrome causes loss of medium-sized plasma proteins and binding proteins, resulting in thyroid hormone deficiency.&#x0D; Objective To assess for potential correlations between subclinical hypothyroidism in pediatric nephrotic syndrome with albumin, globulin, and proteinuria.&#x0D; Methods This cross-sectional study was conducted in the Department of Pediatrics, Hasan Sadikin General Hospital, Bandung, West Java. All types of nephrotic syndrome patients aged 1 month to &lt; 18 years were included. Blood and urine specimens were collected from the patients for albumin, globulin, thyroid function (T3, fT4 and TSH), and proteinuria tests and analyzed with standard techniques.&#x0D; Results There were 26 subjects, 20 males and 6 females. Ten subjects developed subclinical hypothyroidism, with mean albumin and thyroid-stimulating hormone (TSH) levels of 0.92 g/dL and 6.9 mIU/L, respectively. There was a negative correlation between albumin level and subclinical hypothyroidism (rpb=-0.702; P&lt;0.001) and a positive correlation between proteinuria and subclinical hypothyroidism (r=0.573; P=0.003). Univariate logistic regression analysis revealed that globulin had no impact on the presence of subclinical hypothyroidism, but albumin and proteinuria did have such an impact. The odds ratios of albumin and proteinuria with subclinical hypothyroidism were 27.00 (95%CI 1.69 to 17.7) and 19.80 (95%CI 1.94 to 201.63), respectively.&#x0D; Conclusion Subclinical hypothyroidism correlates with serum albumin level and proteinuria in nephrotic syndrome patients. Tha low serum albumin level has a high likelihood of subclinical hypothyroidism.

Subclinical hypothyroidism in pediatric nephrotic syndrome: the correlations with albumin, globulin, and proteinuria

Background Nephrotic syndrome causes loss of medium-sized plasma proteins and binding proteins, resulting in thyroid hormone deficiency.&#x0D; Objective To assess for potential correlations between subclinical hypothyroidism in pediatric nephrotic syndrome with albumin, globulin, and proteinuria.&#x0D; Methods This cross-sectional study was conducted in the Department of Pediatrics, Hasan Sadikin General Hospital, Bandung, West Java. All types of nephrotic syndrome patients aged 1 month to &lt; 18 years were included. Blood and urine specimens were collected from the patients for albumin, globulin, thyroid function (T3, fT4 and TSH), and proteinuria tests and analyzed with standard techniques.&#x0D; Results There were 26 subjects, 20 males and 6 females. Ten subjects developed subclinical hypothyroidism, with mean albumin and thyroid-stimulating hormone (TSH) levels of 0.92 g/dL and 6.9 mIU/L, respectively. There was a negative correlation between albumin level and subclinical hypothyroidism (rpb=-0.702; P&lt;0.001) and a positive correlation between proteinuria and subclinical hypothyroidism (r=0.573; P=0.003). Univariate logistic regression analysis revealed that globulin had no impact on the presence of subclinical hypothyroidism, but albumin and proteinuria did have such an impact. The odds ratios of albumin and proteinuria with subclinical hypothyroidism were 27.00 (95%CI 1.69 to 17.7) and 19.80 (95%CI 1.94 to 201.63), respectively.&#x0D; Conclusion Subclinical hypothyroidism correlates with serum albumin level and proteinuria in nephrotic syndrome patients. Tha low serum albumin level has a high likelihood of subclinical hypothyroidism.

Impact of Subclinical Hypothyroidism on Reproductive and Metabolic Parameters in Polycystic Ovary Syndrome - A Cross-sectional Study from Bangladesh.

Separately, polycystic ovary syndrome (PCOS) and subclinical hypothyroidism (SCH) exert adverse effects on several reproductive and metabolic parameters; however, in conjunction, their effects are unclear. This study evaluated the impact of SCH on reproductive and metabolic parameters in women with PCOS. In this cross-sectional study, women with newly diagnosed PCOS were evaluated. Data on their clinical presentation and anthropometric measurements were recorded, in addition to oral glucose tolerance test, fasting lipid profile, serum thyroid-stimulating hormone (TSH), free thyroxine (FT4) and anti-thyroid peroxidase (anti-TPO). Four hundred and sixty-five women, aged 12-40 years, with PCOS were included in this study; 10.8% of them had SCH and 18.3% were positive for anti-TPO. All participants had statistically similar mean age, body mass index (BMI), waist circumference, systolic blood pressure (BP) and diastolic BP. A similar number of participants in both the euthyroid PCOS and PCOS-SCH groups had menstrual irregularity, acne, subfertility, a first-degree family member with thyroid dysfunction, acanthosis nigricans and elevated BP. Participants with SCH-PCOS had a lower modified Ferriman-Gallwey score and hirsutism frequency, though serum total testosterone levels were similar in the two groups. More subjects in the SCH group were overweight/obese, and had central obesity and goiter compared to the euthyroid group. Blood glucose, lipids and prolactin levels were similar between the two groups; the frequencies of dysglycaemia and dyslipidaemia were also similar. A higher frequency of metabolic syndrome was observed in the SCH group, though the difference was not statistically significant (p=0.098). In women with PCOS, the presence of SCH does not amplify the risk of metabolic and reproductive dysfunctions.

Association between subclinical hypothyroidism and metabolic syndrome among individuals with depression

Although the connection among low thyroid function, metabolic abnormalities, and depression is well documented, the relationship between subclinical hypothyroidism (SCH) and metabolic syndrome (MetS) in depression remains unclear. This study examined the association between SCH and MetS in a large sample with depression. The study analyzed 370 individuals with depression who participated in the 2014 Korea National Health and Nutrition Examination Survey. Associations between the presence of SCH and MetS were estimated after adjusting for related factors using multivariate logistic regression analysis. In the 370 individuals with depression, the prevalence of SCH was 9.4% (SE = 1.6%). The prevalence of MetS was significantly higher in depressed individuals with than in those without SCH (56.3 ± 9.5% vs. 22.8 ± 2.6%; p = 0.001). After adjusting for covariates, the odds of having MetS were 7.127 times greater among depressed individuals with SCH than among those without SCH (95% confidence interval, 2.077-24.458). The cross-sectional study design prevented inferences regarding causality and the effects of changes in variables. Depressed individuals with SCH are more likely to meet the criteria for MetS. These results highlight the significance of low thyroid function and the metabolic burden of individuals with depression.

SAT-LB014 Subclinical Hypothyroidism and All-cause Mortality among Patients with Myocardial Infarction

Introduction: Subclinical hypothyroidism (SCH) is defined as an elevated serum thyroid-stimulating hormone (TSH) level with a normal serum free thyroxine level (FT4). The aim of this study was to investigate the association between SCH and short and long term all-cause mortality in a large cohort of patients with ST elevation myocardial infarction (STEMI). Methods: We evaluated TSH and FT4 levels of 1593 STEMI patients without known history of hypothyroidism or thyroid replacement treatment who were admitted to the coronary care unit and underwent primary PCI between January 2008 and August 2017. The presence of SCH was defined as TSH levels ≥5 mU/ml in the presence of normal free T4 levels. Patients were assessed for short (30 days) and long term (1 year) outcomes. Results: The presence of SCH was demonstrated in 68/1593 (4.2%) of STEMI patients. Patients with SCH had lower left ventricular ejection fraction, older age (more than 60), family history of CAD and were associated independently with 30-day mortality (OR 3.24, 95% CI: 1.22-8.63, p=0.02). Long term mortality was significantly higher among those with SCH (16/68 24 %) than those without SCH (202/1525, 13 %; p<0.001). Following the performance of multivariable cox regression model, SCH was independently associated with long term mortality following STEMI (HR 2.17, 95% CI:1.24-3.79, p=0.007). Conclusions: Among STEMI patients treated with primary coronary intervention the presence of SCH is common and may serve as a significant marker for higher short and long term mortality. Unless otherwise noted, all abstracts presented at ENDO are embargoed until the date and time of presentation. For oral presentations, the abstracts are embargoed until the session begins. s presented at a news conference are embargoed until the date and time of the news conference. The Endocrine Society reserves the right to lift the embargo on specific abstracts that are selected for promotion prior to or during ENDO.

Hypothyroidism and early fetal demise

Background. The study is devoted to the evaluation of thyroid status in patients with early fetal demise.&#x0D; The aim of the study was to assess the prevalence of hypothyroidism, including its subclinical forms, in patients with early fetal demise.&#x0D; Materials and methods. It is an observational “case-control” retrospective study. Group I is represented by first-pregnant women with physiological on-time delivery of the healthy child (375 people). Group II consisted of 375 women who had had an episode of early fetal demise for up to 14 weeks. Laboratory and instrumental methods included assessment of TSH and anti-TPO antibodies levels and ultrasound imaging of the thyroid gland.&#x0D; Results. Given TSH levels &gt; 2.5 mU/L, the diagnosis of subclinical hypothyroidism was established in 13.1% of patients in group I and 26.4% in group II. In patients with repeated early fetal demise, the morbidity reached 48.4%.&#x0D; Conclusion. Hypothyroidism can be recognized as a risk factor for early fetal demise (both the first and subsequent episodes) based on the odds ratio calculation. The odds ratio was 2.48 for early fetal demise in the presence of subclinical hypothyroidism and 2.15 for repeat episodes.

Dietary Selenium Intake and Subclinical Hypothyroidism: A Cross-Sectional Analysis of the ELSA-Brasil Study.

Selenium (Se) participates in several enzymatic reactions necessary for regulating the homeostasis of thyroid hormones. We aimed to analyze the association between dietary Se intake and subclinical hypothyroidism. Baseline data from the Longitudinal Study of Adult Health (Estudo Longitudinal de Saúde do Adulto—ELSA-Brasil) in Brazil were analyzed, with a final sample size of 14,283 employees of both sexes aged 35–74 years. Dietary data was collected using a previously validated food frequency questionnaire. Subclinical hypothyroidism was categorized as thyroid-stimulating hormone levels of >4.0 IU/mL and free prohormone thyroxine levels within normal limits, without administering drugs for thyroid disease. A multiple logistic regression model was used to assess the relationship between the presence of subclinical hypothyroidism and tertiles of Se consumption. The prevalence of subclinical hypothyroidism in the study sample was 5.4% (95% confidence interval [CI], 3.8–7.0%). Compared with the first tertile of Se intake, the second (odds ratio [OR], 0.79; 95% CI, 0.65–0.96%) and third (OR, 0.72; 95% CI, 0.58–0.90%) tertiles were inversely associated with subclinical hypothyroidism, however further research is needed to confirm the involvement of Se in subclinical hypothyroidism using more accurate methodologies of dietary assessment and nutritional status to evaluate this relationship.

Endothelial dysfunction in patients with rheumatoid arthritis and comorbidity

Rheumatoid arthritis (RA) and subclinical hypothyroidism (SHT) have close pathogenetic relationships, the synergism of which worsens the clinical course and increases the risk of visceral complications. Objective: to study the ultrasound parameters of endothelial dysfunction (ED) in patients with RA concurrent with SHT. Patients and methods: 139 patients with RA were divided into two groups: 1) 48 patients with RA; 2) 91 patients with RA concurrent with SHT. The ultrasound parameters of endothelial regulation of vascular tone were determined by intravascular ultrasonography using an ESAOTE MyLAB40 apparatus in accordance with the international guideline. Results and discussion. The study of endothelial regulation of vascular tone established that all the examinees with RA had ED that increased with the higher degree of activity and longer duration of RA. Patients with RA in the presence of SHT had more significant abnormalities in the ultrasound parameters of endothelial regulation of vascular tone and in the degree of ED, which increased with the longer duration and higher activity of the disease. The early detection and correction of comorbidity in patients with RA will reduce cardiovascular risk and improve quality of life.