1
|
Lee J, Baek HS, Jo K, Kim MH, Lee JM, Chang SA, Lim DJ. The Impact of Physical Activity on Thyroid Health: Insights From Representative Data in Korea. J Clin Endocrinol Metab 2024:dgae178. [PMID: 38620035 DOI: 10.1210/clinem/dgae178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Indexed: 04/17/2024]
Abstract
CONTEXT Thyroid hormones are essential for energy metabolism related to thermogenesis and oxygen consumption. OBJECTIVE This study evaluated the potential association of thyroid function including thyroid peroxidase antibodies (TPOAb) with physical activity in nationally representative data. DESIGN/SETTING/PARTICIPANTS This retrospective cohort study used data from the Korean National Health and Nutrition Examination Survey between 2013 and 2015. Physical activity (PA) was assessed using metabolic equivalents based on the validated Korean version of the International Physical Activity Questionnaire Short Form. PA level was categorized into 3 groups of high, moderate, and low. Participants with abnormal thyroid function test, restricted activity, or previous history of thyroid disease were excluded in the study. RESULTS A total of 5372 participants was finally selected. The free T4 level was lowest in the low PA group, while TSH was not significantly different among the groups. TPOAb titers increased in the following order: moderate PA, low PA, and high PA. After adjustment for confounding factors, moderate PA was associated with a high T4 level and a decrease in TSH and TPOAb with significance. However, there were no significant changes in free T4, TSH, or TPOAb titer in the high PA group. In a subanalysis, females with moderate PA showed a significant decrease in TSH and TPOAb. In both males and females, insulin sensitivity was increased with moderate PA. In obese participants, TSH negatively correlated with PA, and free T4 levels decreased in the low PA. The sensitivity to thyroid hormone did not differ in our study. CONCLUSION The present study found an association between thyroid function and moderate PA. Therefore, moderate-intensity PA should be recommended to improve thyroid function.
Collapse
Affiliation(s)
- Jeongmin Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, 03312, Republic of Korea
| | - Han-Sang Baek
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, 06591, Republic of Korea
| | - Kwanhoon Jo
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon, 21431, Republic of Korea
| | - Min-Hee Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, 03312, Republic of Korea
| | - Jung Min Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, 03312, Republic of Korea
| | - Sang Ah Chang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, 03312, Republic of Korea
| | - Dong-Jun Lim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, 06591, Republic of Korea
| |
Collapse
|
2
|
Chachamovitz DSDO, Vigário PDS, Carvalho RC, Silvestre DHDS, Moerbeck AEV, Soffientini MG, Luna ÉLG, Rosemberg CW, Mainenti MRM, Vaisman M, Teixeira PDFDS. Does low serum TSH within the normal range have negative impact on physical exercise capacity and quality of life of healthy elderly people? ARCHIVES OF ENDOCRINOLOGY AND METABOLISM 2015; 60:236-45. [PMID: 26222231 PMCID: PMC10522298 DOI: 10.1590/2359-3997000000079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 06/03/2015] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Investigate the differences in cardiopulmonary (CP) capacity and Quality of Life (QOL) between healthy elderly (≥ 65 years) with different TSH levels (< 1.0 and ≥ 1.0 μIU/mL) both within the normal range. Also, evaluate the effects of TSH elevation on CP test and QOL, by administering methimazole to subjects with initial lower-normal TSH, in order to elevate it to superior-normal limit. MATERIALS AND METHODS Initially, a cross-sectional study was performed to compare CP capacity at peak exercise and QOL (using WHOQOL-OLD questionnaire) between healthy seniors (age ≥ 65 years) with TSH < 1.0 μIU/mL vs. TSH ≥1.0 μIU/mL. In the second phase, participants with TSH < 1.0 μIU/mL were included in a non-controlled-prospective-interventional study to investigate the effect of TSH elevation, using methimazole, on QOL and CP capacity at peak exercise. RESULTS From 89 elderly evaluated, 75 had TSH ≥ 1 μIU/mL and 14 TSH < 1 μIU/mL. The two groups had similar basal clinical characteristics. No difference in WHOQOL-OLD scores was observed between groups and they did not differ in terms of CP function at peak exercise. QOL and CP variables were not correlated with TSH levels. Twelve of 14 participants with TSH < 1.0 μIU/mL entered in the prospective study. After one year, no significant differences in clinical caracteristics, QOL, and CP variables were detected in paired analysis before and after methimazole intervention. CONCLUSIONS We found no differences in CP capacity and QOL between health elderly with different TSH levels within normal range and no impact after one year of methimazole treatment. More prospective-controlled-randomized studies are necessary to confirm or not the possible harm effect in normal low TSH.
Collapse
Affiliation(s)
- Dhiãnah Santini de Oliveira Chachamovitz
- Endocrine ClinicUniversity Hospital Clementino Fraga FilhoRio de JaneiroRJBrazilEndocrine Clinic, University Hospital Clementino Fraga Filho (HUCFF), Rio de Janeiro, RJ, Brazil
- Estácio de Sá UniversityRio de JaneiroRJBrazilEstácio de Sá University, Rio de Janeiro, RJ, Brazil
- Amil Clinical ResearchRio de JaneiroRJBrazilAmil Clinical Research, Rio de Janeiro, RJ, Brazil
| | - Patrícia dos Santos Vigário
- Ergospirometry and Kinanthropometry LaboratoryPhysical Education and Sports SchoolFederal University of Rio de JaneiroRio de JaneiroRJBrazilErgospirometry and Kinanthropometry Laboratory, Physical Education and Sports School, Federal University of Rio de Janeiro(UFRJ)Rio de Janeiro, RJ, Brazil
- Augusto Motta University CenterRio de JaneiroRJBrazilPostgraduate Program of Rehabilitation Sciences, Augusto Motta University Center (Unisuam), Rio de Janeiro, RJ, Brazil
| | - Rafael Cavalcante Carvalho
- Ergospirometry and Kinanthropometry LaboratoryPhysical Education and Sports SchoolFederal University of Rio de JaneiroRio de JaneiroRJBrazilErgospirometry and Kinanthropometry Laboratory, Physical Education and Sports School, Federal University of Rio de Janeiro(UFRJ)Rio de Janeiro, RJ, Brazil
| | - Diego Henrique da Silva Silvestre
- Ergospirometry and Kinanthropometry LaboratoryPhysical Education and Sports SchoolFederal University of Rio de JaneiroRio de JaneiroRJBrazilErgospirometry and Kinanthropometry Laboratory, Physical Education and Sports School, Federal University of Rio de Janeiro(UFRJ)Rio de Janeiro, RJ, Brazil
| | | | | | - Érika Luciana Gomes Luna
- Estácio de Sá UniversityRio de JaneiroRJBrazilEstácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - Clara Werner Rosemberg
- Estácio de Sá UniversityRio de JaneiroRJBrazilEstácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - Míriam Raquel Meira Mainenti
- Ergospirometry and Kinanthropometry LaboratoryPhysical Education and Sports SchoolFederal University of Rio de JaneiroRio de JaneiroRJBrazilErgospirometry and Kinanthropometry Laboratory, Physical Education and Sports School, Federal University of Rio de Janeiro(UFRJ)Rio de Janeiro, RJ, Brazil
- Augusto Motta University CenterRio de JaneiroRJBrazilPostgraduate Program of Rehabilitation Sciences, Augusto Motta University Center (Unisuam), Rio de Janeiro, RJ, Brazil
| | - Mário Vaisman
- Endocrine ClinicUniversity Hospital Clementino Fraga FilhoRio de JaneiroRJBrazilEndocrine Clinic, University Hospital Clementino Fraga Filho (HUCFF), Rio de Janeiro, RJ, Brazil
| | - Patricia de Fátima dos Santos Teixeira
- Endocrine ClinicUniversity Hospital Clementino Fraga FilhoRio de JaneiroRJBrazilEndocrine Clinic, University Hospital Clementino Fraga Filho (HUCFF), Rio de Janeiro, RJ, Brazil
| |
Collapse
|
3
|
Neuroendocrine Considerations in the Rehabilitation of a Patient With Pituitary Apoplexy. TOPICS IN GERIATRIC REHABILITATION 2015. [DOI: 10.1097/tgr.0000000000000059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
4
|
Ittermann T, Gläser S, Ewert R, Felix S, Völzke H, Dörr M. Serum thyroid-stimulating hormone levels are not associated with exercise capacity and lung function parameters in two population-based studies. BMC Pulm Med 2014; 14:145. [PMID: 25182209 PMCID: PMC4236747 DOI: 10.1186/1471-2466-14-145] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Accepted: 08/26/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Thyroid dysfunction has been described to be linked to a variety of cardiovascular morbidities. Through this pathway thyroid function might also be associated with cardiorespiratory function and exercise capacity. So far only few patient-studies with small study populations investigated the association between thyroid dysfunction and exercise capacity. Thus, the aim of our study was to investigate the association of serum thyroid-stimulating hormone (TSH) levels with lung function and cardiopulmonary exercise testing (CPET) in the general population. METHODS Data from the two independent cross-sectional population-based studies (Study of Health in Pomerania [SHIP] and SHIP-Trend-0) were pooled. SHIP was conducted between 2002 and 2006 and SHIP-Trend-0 between 2008 and 2012. Participants were randomly selected from population registries. In total, 4206 individuals with complete data were available for the present analysis. Thyroid function was defined based on serum TSH levels. Lung function was evaluated by forced expiratory volume in 1 s and forced vital capacity. CPET was based on symptom limited exercise tests on a bicycle in a sitting position according to a modified Jones protocol. Associations of serum TSH levels with lung function and CPET parameters were analysed by multivariable quantile regression adjusted for age, sex, height, weight, use of beta blockers, smoking status, and physical activity. RESULTS Serum TSH levels, used as continuously distributed variable and categorized according to the clinical cut-offs 0.3 and 3.0 mIU/L or according to quintiles, were not consistently associated with parameters of lung function or CPET. CONCLUSIONS Our results suggest that thyroid dysfunction is not associated with lung function and cardiopulmonary exercise capacity in the general population.
Collapse
Affiliation(s)
- Till Ittermann
- Institute for Community Medicine, Ernst Moritz Arndt University, Walther Rathenau Str, 48, D-17475 Greifswald, Germany.
| | | | | | | | | | | |
Collapse
|
5
|
Lankhaar JAC, de Vries WR, Jansen JACG, Zelissen PMJ, Backx FJG. Impact of overt and subclinical hypothyroidism on exercise tolerance: a systematic review. RESEARCH QUARTERLY FOR EXERCISE AND SPORT 2014; 85:365-389. [PMID: 25141089 DOI: 10.1080/02701367.2014.930405] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
PURPOSE This systematic review describes the state of the art of the impact of hypothyroidism on exercise tolerance and physical performance capacity in untreated and treated patients with hypothyroidism. METHOD A systematic computer-aided search was conducted using biomedical databases. Relevant studies in English, German, and Dutch, published from the earliest date of each database up to December 2012, were identified. RESULTS Out of 116 studies, a total of 38 studies with 1,379 patients fulfilled the inclusion criteria. These studies emphasize the multifactorial causes of exercise intolerance in untreated patients by the impact of limitations in different functional systems, with cardiovascular, cardiopulmonary, musculoskeletal, neuromuscular, and cellular metabolic systems acting in concert. Moreover, the studies affirm that exercise intolerance in patients is not always reversible during adequate hormone replacement therapy. As a consequence, despite a defined euthyroid status, there remains a significant group of treated patients with persistent complaints related to exercise intolerance who are suffering from limitations in daily and sport activities, as well as an impaired quality of life. An explanation for this phenomenon is lacking. Only 2 studies investigated the effects of a physical training program, and they showed inconsistent effects on the performance capacity in untreated patients with subclinical hypothyroidism. CONCLUSIONS A limited body of knowledge exists concerning exercise tolerance in treated patients with hypothyroidism, and there is an insufficient amount of quantitative studies on the effects of a physical training program. To enhance exercise and sports participation for this specific group, more research in this forgotten area is warranted.
Collapse
|
6
|
Werneck FZ, Coelho EF, de Lima JRP, Laterza MC, Barral MM, Teixeira PDFDS, Vaisman M. Pulmonary oxygen uptake kinetics during exercise in subclinical hypothyroidism. Thyroid 2014; 24:931-8. [PMID: 24512502 PMCID: PMC4046221 DOI: 10.1089/thy.2013.0534] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Patients with subclinical hypothyroidism (SCH) have lower exercise tolerance, but the impact on oxygen uptake (VO2) kinetics is unknown. This study evaluated VO2 kinetics during and after a constant load submaximal exercise in SCH. METHODS The study included 19 women with SCH (thyrotropin (TSH)=6.87±2.88 μIU/mL, free thyroxine (fT4)=0.97±0.15 ng/dL) and 19 controls (TSH=2.29±0.86 μIU/mL, T4=0.99±0.11 ng/dL) aged between 20 and 55 years. Ergospirometry exercise testing was performed for six minutes with a constant load of 50 W, followed by six minutes of passive recovery. The VO2 kinetics was quantified by the mean response time (MRT), which is the exponential time constant and approximates the time needed to reach 63% of change in VO2 (ΔVO2). The O2 deficit-energy supplied by anaerobic metabolism at the onset of exercise-and O2 debit-extra energy demand during the recovery period-were calculated by the formula MRT×ΔVO2. Values are mean±standard deviation. RESULTS In the rest-exercise transition, patients with SCH showed slower VO2 kinetics (MRT=47±8 sec vs. 40±6 sec, p=0.004) and a higher oxygen deficit (580±102 mL vs. 477±95 mL, p=0.003) than controls respectively. In the exercise-recovery transition, patients with SCH also showed slower VO2 kinetics (MRT=54±6 sec vs. 44±6 sec, p=0.001) and a higher oxygen debit (679±105 mL vs. 572±104 mL, p=0.003). The VO2 kinetics showed a significant correlation with TSH (p<0.05). CONCLUSIONS This study demonstrates that women with SCH have the slowest VO2 kinetics in the onset and recovery of a constant-load submaximal exercise and highlights that this impairment is already manifest in the early stage of the disease.
Collapse
Affiliation(s)
- Francisco Zacaron Werneck
- Endocrine Service, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- Faculty of Physical Education, Federal University of Ouro Preto, Ouro Preto, Brazil
| | - Emerson Filipino Coelho
- Endocrine Service, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- Faculty of Physical Education, Federal University of Ouro Preto, Ouro Preto, Brazil
| | | | - Mateus Camaroti Laterza
- Faculty of Physical Education and Sports, Federal University of Juiz de Fora, Juiz de Fora, Brazil
| | | | | | - Mário Vaisman
- Endocrine Service, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| |
Collapse
|
7
|
Schlenker EH, Del Rio R, Schultz HD. Hypothyroidism affects D2 receptor-mediated breathing without altering D2 receptor expression. Respir Physiol Neurobiol 2014; 193:29-37. [PMID: 24434437 DOI: 10.1016/j.resp.2014.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 12/31/2013] [Accepted: 01/03/2014] [Indexed: 11/27/2022]
Abstract
Bromocriptine depressed ventilation in air and D2 receptor expression in the nucleus tractus solitaries (NTS) in male hypothyroid hamsters. Here we postulated that in age-matched hypothyroid female hamsters, the pattern of D2 receptor modulation of breathing and D2 receptor expression would differ from those reported in hypothyroid males. In females hypothyroidism did not affect D2 receptor protein levels in the NTS, carotid bodies or striatum. Bromocriptine, but not carmoxirole (a peripheral D2 receptor agonist), increased oxygen consumption and body temperature in awake air-exposed hypothyroid female hamsters and stimulated their ventilation before and following exposure to hypoxia. Carmoxirole depressed frequency of breathing in euthyroid hamsters prior to, during and following hypoxia exposures and stimulated it in the hypothyroid hamsters following hypoxia. Although hypothyroidism did not affect expression of D2 receptors, it influenced central D2 modulation of breathing in a disparate manner relative to euthyroid hamsters.
Collapse
Affiliation(s)
- Evelyn H Schlenker
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, 414 East Clark Street, Vermillion, SD 57069, United States.
| | - Rodrigo Del Rio
- Department of Cellular & Integrative Physiology, University of Nebraska College of Medicine, 985850 Nebraska Medical Center, Omaha, NE 68198-5850, United States
| | - Harold D Schultz
- Department of Cellular & Integrative Physiology, University of Nebraska College of Medicine, 985850 Nebraska Medical Center, Omaha, NE 68198-5850, United States
| |
Collapse
|
8
|
Sunita, Mahajan AS, Jain A, Singh N, Mishra T. Heart rate and blood pressure response to exercise and recovery in subclinical hypothyroid patients. Int J Appl Basic Med Res 2013; 3:106-10. [PMID: 24083145 PMCID: PMC3783662 DOI: 10.4103/2229-516x.117076] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Accepted: 07/09/2013] [Indexed: 11/19/2022] Open
Abstract
Background: Exercise response of asymptomatic subclinical hypothyroid patients may aid in early diagnosis of cardiovascular morbidity. Aim: To study and compare the heart rate and blood pressure changes during exercise and recovery in subclinical hypothyroid patients and euthyroid controls. Materials and Methods: For the study, 30 each cases (mean age of 40 ± 7 years) of subclinical hypothyroidism and healthy controls underwent exercise as per Bruce protocol. Heart rate (HR) and blood pressure (BP) changes were compared every minute (min) till 3 min of stage II exercise, continued till maximum heart rate and thereafter on recovery, for 5 min after stoppage of exercise. Results: Both groups had normal HR and BP at rest, heart rate and BP increased with exercise and remained high even after 5 min of recovery from exercise. The increase in systolic blood pressure (SBP) with exercise was less in patients at the stage of exercise where maximum HR was achieved and up to 1 min of recovery. SBP at 5 min of recovery was higher in patients (P = 0.018). Diastolic blood pressure (DBP) increased with exercise and changes were similar in both groups during exercise and recovery. HR was higher in patients at 1 min of exercise. Changes in HR from 1 min of recovery to 2-5 min of recovery were significant in both groups. Conclusion: The present pilot study highlights that many parameters of HR and SBP during exercise and recovery in asymptomatic subclinical hypothyroid patients may differ from euthyroid, controls.
Collapse
Affiliation(s)
- Sunita
- Department of Physiology, Maulana Azad Medical College, New Delhi, India
| | | | | | | | | |
Collapse
|
9
|
Gomes AM, Rocha-e-Silva M. Exercise and its interactions with various aspects of man and animal lives. ACTA ORTOPEDICA BRASILEIRA 2012; 20:356-66. [PMID: 24453632 PMCID: PMC3861955 DOI: 10.1590/s1413-78522012000600009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 07/30/2012] [Indexed: 08/30/2023]
Abstract
To review recently published papers in the Brazilian Scientific press on the general subject of physical exercise. All articles published in 2010/2011 found through the keyword exercise were collected from 11 Brazilian Journals. They were hand filtered to exclude all but original research papers. They were grouped according to subject categories and subcategories. A brief summary of all included articles was produced, comparing similar articles between them. The most commonly found interactions refer to exercise vs. the cardiovascular system, metabolism and the locomotor system, in this order. The volume of scientific research in the field is high and of sufficient quality to justify highlighting.
Collapse
|
10
|
Gomes AM, Higa DA. Pulmonary research recently published in Brazilian journals. J Bras Pneumol 2012; 38:634-42. [PMID: 23147057 DOI: 10.1590/s1806-37132012000500014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Accepted: 09/14/2012] [Indexed: 11/22/2022] Open
Abstract
We reviewed original articles in the field of pulmonary medicine that had been recently published in 12 Brazilian journals--general or specialty journals--excluding the Brazilian Journal of Pulmonology. All were journals indexed for the Institute for Scientific Information Web of Knowledge. The selection of articles was based on the "continuously variable rating" concept. We have organized the articles by category.
Collapse
|
11
|
Schlenker EH. Effects of hypothyroidism on the respiratory system and control of breathing: Human studies and animal models. Respir Physiol Neurobiol 2012; 181:123-31. [DOI: 10.1016/j.resp.2012.02.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Revised: 02/16/2012] [Accepted: 02/19/2012] [Indexed: 01/11/2023]
Affiliation(s)
- Evelyn H Schlenker
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, 414 East Clark St., Vermillion, SD 57069, United States.
| |
Collapse
|
12
|
Martins RM, Fonseca RHA, Duarte MMT, Reuters VS, Ferreira MM, Almeida C, Buescu A, Teixeira PDFDS, Vaisman M. Impact of subclinical hypothyroidism treatment in systolic and diastolic cardiac function. ACTA ACUST UNITED AC 2011; 55:460-7. [DOI: 10.1590/s0004-27302011000700005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Accepted: 09/24/2011] [Indexed: 11/22/2022]
Abstract
OBJECTIVE: To evaluate the effects of levothyroxine (L-T4) replacement in echocardiographic parameters of middle-aged women with subclinical hypothyroidism (SH). SUBJECTS AND METHODS: This was a randomized, double-blind, placebo-controlled study. Echocardiographic evaluation was carried out at baseline and one year after restoration of euthyroidism. Thirty-three women with SH were assigned to one of two groups (L-T4 or placebo). RESULTS: The two groups had similar basal characteristics. There was a significant deterioration of left ventricular Tei index after one year of placebo use, which differed from the effect of L-T4 replacement (+0.086 ± 0.092 vs. -0.014 ± 0.012; p = 0.047). There was also a slight reduction in cardiac output and cardiac index with placebo use, which was not different from L-T4 effect. CONCLUSION: Results suggest a positive impact of L-T4 replacement in cardiac function of middle-aged women with SH.
Collapse
|