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Kuchulakanti AS, Sharma R, Utagi B. Left Ventricular Diastolic Dysfunction in Patients with Subclinical Hypothyroidism: A Single South Indian Tertiary Care Centre Study. JOURNAL OF HEALTH AND ALLIED SCIENCES NU 2023. [DOI: 10.1055/s-0042-1760089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Abstract
Context Subclinical hypothyroidism (SCH) has been implicated in left ventricular diastolic dysfunction (LVDD).
Aims To study the association between SCH and LVDD.
Objectives To analyze the association between SCH and LVDD. To correlate the amount of LVDD with the serum thyroid-stimulating hormone (TSH) levels.
Settings and Design Single-center case–control study.
Methods and Material A case–control study was conducted between January 2020 and June 2021. A total of 36 cases of SCH were enrolled in the study and 36 age- and gender-matched euthyroid controls were included. Each individual's LV diastolic functioning was assessed by 2D echocardiography. LVDD was graded and compared between cases and controls.
Statistical Analysis Used The sample size was calculated to be 72 based on previous studies. Statistical analysis was performed using the IBM SPSS software version 20. A p-value of less than 0.05 was considered significant.
Results SCH was more commonly seen among females (75%) as compared with males (25%). Among cases, a majority of them (75%) had grade 1 SCH (i.e., TSH < 10 mU/L) and 25% of them had grade 2 SCH (i.e., TSH ≥ 10 mU/L). Among all the parameters assessed for LV diastolic function, the isovolumetric relaxation time and septal E/e' ratio was found to be significantly higher in cases than in controls and mitral E wave deceleration time (DT) significantly lower in cases. A statistically significant majority (72.2%) of the patients with SCH had some form of LVDD as compared with controls (30.5%)
Conclusions Walk-in outpatient department patients who opt for health check-up packages should be screened for SCH. SCH is statistically significantly associated with higher grades of LVDD as compared with age- and gender-matched euthyroid controls.
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Affiliation(s)
| | - Raghava Sharma
- Department of General Medicine, K.S. Hegde Medical Academy, Karnataka, India
| | - Basavaraj Utagi
- Department of Cardiology, K.S. Hegde Medical Academy, Karnataka, India
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Tafarshiku R, Henein MY, Berisha-Muharremi V, Bytyçi I, Ibrahimi P, Poniku A, Elezi S, Bajraktari G. Left Ventricular Diastolic and Systolic Functions in Patients with Hypothyroidism. MEDICINA (KAUNAS, LITHUANIA) 2020; 56:medicina56100524. [PMID: 33036429 PMCID: PMC7601772 DOI: 10.3390/medicina56100524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 09/30/2020] [Accepted: 10/04/2020] [Indexed: 02/05/2023]
Abstract
Background and objectives: Long standing hypothyroidism may impair myocardial relaxation, but its effect on systolic myocardial function is still controversial. The aim of this study was to investigate left ventricular (LV) systolic and diastolic function in patients with hypothyroidism. Materials and Methods: This study included 81 (age 42 ± 13 years, 92% female) patients with hypothyroidism, and 22 age and gender matched controls. All subjects underwent a detailed clinical examination followed by a complete biochemical blood analysis including thyroid function assessment and anthropometric parameters measurements. LV function was assessed by 2-dimensional, M-mode and Tissue-Doppler Doppler echocardiographic examination performed in the same day. Results: Patients had lower waist/hip ratio (p< 0.001), higher urea level (p = 0.002), and lower white blood cells (p = 0.011), compared with controls. All other clinical, biochemical, and anthropometric data did not differ between the two groups. Patients had impaired LV diastolic function (lower E wave [p< 0.001], higher A wave [p = 0.028], lower E/A ratio [p< 0.001], longer E wave deceleration time [p = 0.01], and higher E/e' ratio [p< 0.001]), compared with controls. Although LV global systolic function did not differ between groups, LV longitudinal systolic function was compromised in patients (lateral mitral annular plane systolic excursion-MAPSE [p = 0.005], as were lateral and septal s' [p< 0.001 for both]). Conclusions: In patients with hypothyroidism, in addition to compromised LV diastolic function, LV longitudinal systolic function is also impaired compared to healthy subjects of the same age and gender. These findings suggest significant subendocardial function impairment, reflecting potentially micro-circulation disease that requires optimum management.
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Affiliation(s)
- Rina Tafarshiku
- Clinic of Endocrinology, University Clinical Centre of Kosova, 10000 Prishtina, Kosovo; (R.T.); (V.B.-M.)
- Medical Faculty, University of Prishtina, 10000 Prishtina, Kosovo; (A.P.); (S.E.)
| | - Michael Y. Henein
- Institute of Public Health and Clinical Medicine, Umeå University, SE-901 87 Umeå, Sweden; (M.Y.H.); (I.B.); (P.I.)
| | - Venera Berisha-Muharremi
- Clinic of Endocrinology, University Clinical Centre of Kosova, 10000 Prishtina, Kosovo; (R.T.); (V.B.-M.)
- Medical Faculty, University of Prishtina, 10000 Prishtina, Kosovo; (A.P.); (S.E.)
| | - Ibadete Bytyçi
- Institute of Public Health and Clinical Medicine, Umeå University, SE-901 87 Umeå, Sweden; (M.Y.H.); (I.B.); (P.I.)
- Clinic of Cardiology, University Clinical Centre of Kosova, 10000 Prishtina, Kosovo
| | - Pranvera Ibrahimi
- Institute of Public Health and Clinical Medicine, Umeå University, SE-901 87 Umeå, Sweden; (M.Y.H.); (I.B.); (P.I.)
- Clinic of Cardiology, University Clinical Centre of Kosova, 10000 Prishtina, Kosovo
| | - Afrim Poniku
- Medical Faculty, University of Prishtina, 10000 Prishtina, Kosovo; (A.P.); (S.E.)
- Clinic of Cardiology, University Clinical Centre of Kosova, 10000 Prishtina, Kosovo
| | - Shpend Elezi
- Medical Faculty, University of Prishtina, 10000 Prishtina, Kosovo; (A.P.); (S.E.)
| | - Gani Bajraktari
- Medical Faculty, University of Prishtina, 10000 Prishtina, Kosovo; (A.P.); (S.E.)
- Institute of Public Health and Clinical Medicine, Umeå University, SE-901 87 Umeå, Sweden; (M.Y.H.); (I.B.); (P.I.)
- Clinic of Cardiology, University Clinical Centre of Kosova, 10000 Prishtina, Kosovo
- UBT—University for Business and Technology, 10000 Prishtina, Kosovo
- Correspondence:
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Manolis AA, Manolis TA, Melita H, Manolis AS. Subclinical thyroid dysfunction and cardiovascular consequences: An alarming wake-up call? Trends Cardiovasc Med 2020; 30:57-69. [DOI: 10.1016/j.tcm.2019.02.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 02/14/2019] [Accepted: 02/25/2019] [Indexed: 12/12/2022]
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Neves JS, Vale C, von Hafe M, Borges-Canha M, Leite AR, Almeida-Coelho J, Lourenço A, Falcão-Pires I, Carvalho D, Leite-Moreira A. Thyroid hormones and modulation of diastolic function: a promising target for heart failure with preserved ejection fraction. Ther Adv Endocrinol Metab 2020; 11:2042018820958331. [PMID: 33088475 PMCID: PMC7543162 DOI: 10.1177/2042018820958331] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 08/20/2020] [Indexed: 12/16/2022] Open
Abstract
Heart failure with preserved ejection fraction (HFpEF) is a clinical syndrome with high mortality for which there is no proven therapy to improve its prognosis. Thyroid dysfunction is common in heart failure (HF) and is associated with worse prognosis. In this review, we discuss the cardiovascular effects of thyroid hormones, the pathophysiology of HFpEF, the prognostic impact of thyroid function, and the potential of thyroid hormones for treatment of HFpEF. Thyroid hormones have a central role in cardiovascular homeostasis, improving cardiac function through genomic and non-genomic mechanisms. Both overt and subclinical hypothyroidism are associated with increased risk of HF. Even when plasmatic thyroid hormones levels are normal, patients with HF may have local cardiac hypothyroidism due to upregulation of type 3 iodothyronine deiodinase. Thyroid hormones improve several pathophysiological mechanisms of HFpEF, including diastolic dysfunction and extra-cardiac abnormalities. Supplementation with thyroid hormones (levothyroxine and/or liothyronine), modulation of deiodinase activity, and heart-specific thyroid receptor agonists are potential therapeutic approaches for the treatment of HFpEF. Further preclinical and clinical studies are needed to clarify the role of thyroid hormones in the treatment of HFpEF.
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Affiliation(s)
- João Sérgio Neves
- Departamento de Cirurgia e Fisiologia, Unidade
de Investigação Cardiovascular, Faculdade de Medicina, Universidade do
Porto, Porto, Portugal
- Department of Endocrinology, Diabetes and
Metabolism, Centro Hospitalar Universitário de São João, Faculdade de
Medicina, Universidade do Porto, Porto, Portugal
| | - Catarina Vale
- Departamento de Cirurgia e Fisiologia, Unidade
de Investigação Cardiovascular, Faculdade de Medicina, Universidade do
Porto, Porto, Portugal
| | - Madalena von Hafe
- Departamento de Cirurgia e Fisiologia, Unidade
de Investigação Cardiovascular, Faculdade de Medicina, Universidade do
Porto, Porto, Portugal
| | - Marta Borges-Canha
- Departamento de Cirurgia e Fisiologia, Unidade
de Investigação Cardiovascular, Faculdade de Medicina, Universidade do
Porto, Porto, Portugal
- Department of Endocrinology, Diabetes and
Metabolism, Centro Hospitalar Universitário de São João, Faculdade de
Medicina, Universidade do Porto, Porto, Portugal
| | - Ana Rita Leite
- Departamento de Cirurgia e Fisiologia, Unidade
de Investigação Cardiovascular, Faculdade de Medicina, Universidade do
Porto, Porto, Portugal
| | - João Almeida-Coelho
- Departamento de Cirurgia e Fisiologia, Unidade
de Investigação Cardiovascular, Faculdade de Medicina, Universidade do
Porto, Porto, Portugal
| | - André Lourenço
- Departamento de Cirurgia e Fisiologia, Unidade
de Investigação Cardiovascular, Faculdade de Medicina, Universidade do
Porto, Porto, Portugal
| | - Inês Falcão-Pires
- Departamento de Cirurgia e Fisiologia, Unidade
de Investigação Cardiovascular, Faculdade de Medicina, Universidade do
Porto, Porto, Portugal
| | - Davide Carvalho
- Department of Endocrinology, Diabetes and
Metabolism, Centro Hospitalar Universitário de São João, Faculdade de
Medicina, Universidade do Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde
da Universidade do Porto, Portugal
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Tadic M, Cuspidi C, Vasic D, Kerkhof PLM. Cardiovascular Implications of Diabetes, Metabolic Syndrome, Thyroid Disease, and Cardio-Oncology in Women. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1065:471-488. [PMID: 30051402 DOI: 10.1007/978-3-319-77932-4_29] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Cardiovascular disease may be associated with several comorbidities, including diabetes mellitus, thyroid disorders, and the metabolic syndrome, which are predominantly observed in women and often starting at particular ages. In addition, common treatment options for carcinomas frequently seen in women may induce serious cardiotoxic effects. We review the scope of the problem, the pathophysiologic mechanisms involved, as well as the resulting abnormalities regarding cardiac structure and function as observed by using imaging techniques.
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Affiliation(s)
- Marijana Tadic
- Department of Cardiology, Charité-University-Medicine Berlin, Berlin, Germany.
| | - Cesare Cuspidi
- University of Milan-Bicocca and Istituto Auxologico Italiano, Clinical Research Unit, Meda, Italy
| | - Dragan Vasic
- Clinic of Vascular and Endovascular Surgery, Clinical Centre of Serbia, Belgrade, Serbia
| | - Peter L M Kerkhof
- Department of Radiology and Nuclear Medicine, Amsterdam Cardiovascular Sciences, VU University Medical Center, Amsterdam, The Netherlands
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Diffuse Myocardial Injuries are Present in Subclinical Hypothyroidism: A Clinical Study Using Myocardial T1-mapping Quantification. Sci Rep 2018; 8:4999. [PMID: 29567964 PMCID: PMC5864753 DOI: 10.1038/s41598-018-22970-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 03/02/2018] [Indexed: 12/31/2022] Open
Abstract
Subclinical hypothyroidism (SHT) is a common disorder that may represent early thyroid dysfunction and is related to adverse cardiovascular events. However, myocardial injuries induced by SHT are difficult to detect. Our previous study demonstrated that the cardiac magnetic resonance (CMR) myocardial longitudinal relaxation time (T1) mapping technique is a useful tool for assessing diffuse myocardial injuries in overt hypothyroidism patients. This study was designed to detect whether diffuse myocardial injuries were present in SHT by using the T1 mapping technique. We found that SHT participants had significantly increased native T1 values within four segments of the left ventricle (all p < 0.01), especially patients with thyroid-stimulating hormone (TSH) levels ≥10 µIU/mL, compared with those in the controls. In addition, the native T1 values were negatively correlated with free thyroxine (FT4) (r = −0.476, p = 0.003) and were positively correlated with TSH (r = 0.489, p = 0.002). Furthermore, left ventricular diastolic function estimated by the peak filling rate (PFR) was significantly lower in patients with TSH levels ≥10 µIU/mL than that in the controls (p < 0.05). In conclusion, diffuse myocardial injuries were present in SHT, and T1 mapping may be a useful tool for evaluating mild myocardial injuries in SHT at an early stage. Our study is the first to confirm myocardial injuries in SHT patients using T1 mapping.
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Malhotra Y, Kaushik RM, Kaushik R. Echocardiographic evaluation of left ventricular diastolic dysfunction in subclinical hypothyroidism: A case-control study. Endocr Res 2017; 42:198-208. [PMID: 28287839 DOI: 10.1080/07435800.2017.1292524] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
PURPOSE To study the prevalence of left ventricular diastolic dysfunction (LVDD) in patients with subclinical hypothyroidism (SCH) and the response of LVDD to L-thyroxine therapy. MATERIALS AND METHODS This cross-sectional case-control study with one longitudinal arm included 67 patients with SCH attending a tertiary care hospital in Uttarakhand, India, and 67 age- and sex-matched healthy controls. LVDD was assessed by 2D, pulsed-wave Doppler (PWD), continuous wave Doppler (CWD), and tissue Doppler echocardiography (TDE). Patients with LVDD received L-thyroxine therapy with reassessment for LVDD 6 months later. RESULTS SCH patients had a higher prevalence of LVDD than controls (13.43% versus 1.49%; p = 0.017). LVDD showed a significant association with gender (p = 0.004) and serum FT4 (p = 0.001). E velocity, E' velocity, A' velocity, iso-volumetric relaxation time (IVRT), E/A, and E'/A' ratios were significantly lower, while A velocity, deceleration time (DT), E/E' ratio, left atrial (LA) volume index, and peak tricuspid regurgitation (TR) velocity were significantly higher in cases than controls (p < 0.05 each). The E/A ratio correlated significantly with age, serum very low-density lipoprotein (VLDL), triglycerides (TG), thyroid stimulating hormone (TSH), free triiodothyronine (FT3), and high-density lipoprotein (HDL) (p < 0.05 each). E' velocity correlated significantly with age, serum total cholesterol, VLDL, and TG (p < 0.05 each), DT with serum total cholesterol (p = 0.047), and LA volume index with age (p = 0.021). Age (p = 0.016) and serum HDL (p = 0.029) were independent predictors of E/A ratio. Gender was an independent predictor for LVDD (p = 0.003). Echocardiographic indices for LVDD showed significant improvement after 6 months of L-thyroxine therapy (p < 0.05 each). CONCLUSIONS LVDD occurs commonly in SCH patients. It can be detected timely using echocardiography and may be reversed by L-thyroxine therapy.
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Affiliation(s)
- Yuthika Malhotra
- a Department of Medicine , Himalayan Institute of Medical Sciences, Swami Rama Himalayan University , Dehradun , Uttarakhand , India
| | - Rajeev Mohan Kaushik
- a Department of Medicine , Himalayan Institute of Medical Sciences, Swami Rama Himalayan University , Dehradun , Uttarakhand , India
| | - Reshma Kaushik
- a Department of Medicine , Himalayan Institute of Medical Sciences, Swami Rama Himalayan University , Dehradun , Uttarakhand , India
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Gao C, Li T, Liu J, Guo Q, Tian L. Endothelial Functioning and Hemodynamic Parameters in Rats with Subclinical Hypothyroid and the Effects of Thyroxine Replacement. PLoS One 2015; 10:e0131776. [PMID: 26158620 PMCID: PMC4497722 DOI: 10.1371/journal.pone.0131776] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Accepted: 06/05/2015] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVE Subclinical hypothyroidism (SCH) and its associations with atherosclerosis (AS) and cardiovascular disease remain controversial. The purpose of our study was to observe changes in endothelial functioning and hemodynamics in rats with SCH and to determine whether L-thyroxine (L-T4) administration affects these changes. METHODS In total, sixty male Wistar rats were randomly divided into the following three groups with 20 rats each: control euthyroid rats, SCH rats and SCH rats that had been treated with thyroxine (SCH+T4). The SCH rats were induced by administration of 10 mg x kg(-1) x d(-1) methimazole (MMI) once daily by gavage for 3 months. The SCH+T4 rats were administered the same dose of MMI for three months in addition to 2 μg x kg(-1) x d(-1) L-T4 once daily by gavage after 45 days of MMI administration. The control rats received physiological saline via gavage. RESULTS The SCH group had significantly higher thyroid-stimulating hormone (TSH), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), and endothelin (ET) levels and a lower nitric oxide (NO) level than the control and SCH+T4 groups. The tail and carotid artery blood pressures, left ventricular systolic pressure, heart rate and aorta ventralis blood flow were significantly lower in the SCH group than in the control and SCH+T4 groups. ACH treatment caused concentration-dependent relaxation, which was reduced in the SCH arteries compared with the control and SCH+T4 arteries. Histopathological examination revealed the absence of pathological changes in the SCH rat arteries. CONCLUSIONS These findings demonstrate that L-T4 treatment ameliorates endothelial dysfunction and hemodynamic changes in SCH rats.
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Affiliation(s)
- Cuixia Gao
- Departments of Ultrasonic Diagnosis, Gansu Provincial Hospital, Lanzhou, Gansu, China
| | - Tingting Li
- Department of Clinical Medicine, Gansu University of Chinese Medicine, Lanzhou, Gansu, China
| | - Jing Liu
- Departments of Endocrinology, Gansu Provincial Hospital, Lanzhou, Gansu, China
| | - Qian Guo
- Departments of Endocrinology, Gansu Provincial Hospital, Lanzhou, Gansu, China
| | - Limin Tian
- Departments of Endocrinology, Gansu Provincial Hospital, Lanzhou, Gansu, China
- * E-mail:
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Catli G, Abaci A, Büyükgebiz A, Bober E. Subclinical hypothyroidism in childhood and adolescense. J Pediatr Endocrinol Metab 2014; 27:1049-57. [PMID: 25153584 DOI: 10.1515/jpem-2014-0089] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 07/22/2014] [Indexed: 01/11/2023]
Abstract
Subclinical hypothyroidism (SH) is defined as a serum thyroid-stimulating hormone (TSH) level above the reference range with normal serum free thyroxin (sT4) and free triiodothyronine (sT3) levels. The prevalence of SH in children and adolescents is reported between 1.7% and 9.5%. Hashimoto's thyroiditis is the most prevalent cause of SH in children. Although it has been suggested that SH is entirely an asymptomatic laboratory diagnosis, typical hypothyroid symptoms as well have been reported in some patients. Results of the adult studies on SH revealed that SH had unfavorable effects on cardiovascular system (atherosclerosis); metabolic parameters (dyslipidemia, insulin resistance, etc.); neuromuscular system; and cognitive functions in the long term. The number of studies investigating the effect of childhood SH on growth, bone maturation, lipid parameters, carbohydrate metabolism, neuromuscular system, and cognitive and cardiac function is limited. Knowledge about the natural history of SH is unclear even though there are numerous studies upon this subject. In children and adults, treatment of SH with L-T₄ is still a matter of debate, and there is no consensus on this issue yet.
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Tadic M, Ilic S, Celic V. Right ventricular and right atrial function and deformation in patients with subclinical hypothyroidism: a two- and three-dimensional echocardiographic study. Eur J Endocrinol 2014; 170:77-85. [PMID: 24114432 DOI: 10.1530/eje-13-0676] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND We sought to investigate right ventricular (RV) function and deformation assessed by three-dimensional echocardiography (3DE) and speckle tracking in patients with subclinical hypothyroidism (SHT), and to evaluate the influence of levothyroxine (L-T₄) therapy on RV remodeling. METHODS We included 50 untreated women with SHT and 45 healthy control women matched by age. The L-T₄ therapy was prescribed to all SHT patients who were followed 1 year after euthyroid status was achieved. All study participants underwent laboratory analyses which included thyroid hormone levels, and complete two-dimensional echocardiography (2DE) and 3DE examinations. RESULTS 3DE RV end-diastolic volume and ejection fraction were significantly reduced in the SHT patients before therapy in comparison with the healthy controls and treated SHT subjects. RV longitudinal strain, systolic, and early diastolic strain rates (SRs) were significantly decreased, whereas RV late diastolic SR was increased in the SHT patients before therapy when comparing with the controls. 2DE speckle tracking imaging revealed that L-T₄ substitution therapy significantly improved RV systolic mechanics, whereas RV diastolic deformation was not completely recovered. Right atrial (RA) function and deformation were significantly impacted by SHT. Replacement L-T₄ treatment improved but did not completely restore RA mechanics in the SHT patients. CONCLUSION RV and RA function and mechanics are significantly affected by SHT. L-T₄ therapy and 1-year maintenance of euthyroid status improved but did not completely recover RV and RA function and deformation in the SHT patients, which implies that right heart remodeling caused by SHT is not reversible in a 1-year period.
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Tadic M, Ilic S, Kostic N, Caparevic Z, Celic V. Subclinical hypothyroidism and left ventricular mechanics: a three-dimensional speckle tracking study. J Clin Endocrinol Metab 2014; 99:307-14. [PMID: 24187401 DOI: 10.1210/jc.2013-3107] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
CONTEXT Subclinical hypothyroidism (SHT) is associated with left ventricular (LV) remodeling. The LV mechanics has not been previously assessed by two- and three-dimensional (2DE and 3DE) speckle tracking imaging in the SHT patients. OBJECTIVES The objective of the study was to investigate LV mechanics by 2DE and 3DE speckle tracking in the SHT patients and evaluate the influence of levothyroxine therapy on LV remodeling. DESIGN We conducted a prospective study. All SHT patients received levothyroxine therapy and were followed up for 1 year after the euthyroid state had been achieved. SETTING The study was performed at a university hospital. PATIENTS We included 54 untreated women with SHT and 40 healthy control women who were of similar age. MAIN OUTCOME MEASURES The 2DE strain and strain rates, 3DE volumes, 3DE strain, and thyroid hormones levels were assessed. RESULTS The 2DE LV longitudinal and circumferential strain and systolic and early diastolic strain rates were significantly decreased in the SHT patients before therapy in comparison with the controls or the SHT patients after therapy. The 3DE LV cardiac output and ejection fraction were significantly reduced in the SHT patients at baseline compared with the controls or patients after 1 year of treatment. The 3DE LV longitudinal and radial strains were significantly lower in the SHT group before treatment in comparison with the controls or patients after therapy, whereas the 3DE LV circumferential and area strains gradually increased from untreated SHT patients, among the treated SHT patients, to the controls. CONCLUSION SHT significantly affects LV deformation assessed by 2DE and 3DE speckle tracking. The improvement of LV mechanics after 1 year of levothyroxine treatment is significant but incomplete.
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Affiliation(s)
- Marijana Tadic
- Departments of Cardiology (M.T., V.C.) and Endocrinology (S.I., N.K., Z.C.), University Clinical Hospital Center "Dr Dragisa Misovic," Heroja Milana Tepica 1, and Faculty of Medicine (N.K., Z.C., V.C.), Doktora Subotica 6, 11000 Belgrade, Serbia
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Ilic S, Tadic M, Ivanovic B, Caparevic Z, Trbojevic B, Celic V. Left and right ventricular structure and function in subclinical hypothyroidism: the effects of one-year levothyroxine treatment. Med Sci Monit 2013; 19:960-8. [PMID: 24217559 PMCID: PMC3829699 DOI: 10.12659/msm.889621] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND The aim of this study was to investigate left ventricular (LV) and right ventricular (RV) structure, function, and mechanics in patients with subclinical hypothyroidism (SHT), and to evaluate the effect of a 1-year levothyroxine treatment. MATERIAL AND METHODS We compared 45 untreated women with subclinical hypothyroidism and 35 healthy control women matched by age. All the subjects underwent laboratory analyses, which included a thyroid hormone levels (free T3, free T4, and TSH) test, and a complete 2-dimensional echocardiographic study. All the SHT patients received levothyroxine therapy and were followed for a year after euthyroid state was achieved. RESULTS The LV mass index in the SHT participants before and after replacement therapy was significantly higher than in controls. In the SHT patients before the treatment, LV diastolic function and global function estimated by the Tei index were significantly impaired, whereas the LV systolic function was decreased. The results show that LV mechanics was significantly impaired in the SHT patients at baseline. Additionally, the SHT participants before levothyroxine substitution had increased RV wall thickness and significantly impaired RV diastolic and global function in comparison with the controls or the SHT subjects after the treatment. Furthermore, RV mechanics was also significantly deteriorated in the SHT patients before the treatment. CONCLUSIONS Subclinical hypothyroidism significantly affected LV and RV structure, systolic, diastolic and global function, and LV and RV mechanics. Levothyroxine replacement therapy significantly improved cardiac structure, function, and mechanics in the SHT patients.
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Affiliation(s)
- Sanja Ilic
- Department of Endocrinology, University Clinical Hospital Center "Dr Dragisa Misovic", Belgrade, Serbia
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