ABC | Volume 112, Nº6, June 2019

765 Original Article Rajão et al Subclinical thyroid dysfunction and arrhythmias Arq Bras Cardiol. 2019; 112(6):758-766 8. Ochs N, Auer R, Bauer DC, Nanchen D, Gussekloo J, Cornuz J, et al. Meta- analysis: Subclinical Thyroid Disfunction and the risk for coronary heart disease and mortality. Ann Intern Med. 2008;148(11):832-45. 9. Cappola AR, Fried LP, Arnold AM, Danese MD, Kuller LH, Burke GL, et al. Thyroid status, cardiovascular risk, and mortality in older adults. JAMA. 2006;295(9):1033-41. 10. Waring AC, Arnold AM, Newman AB, Bùzkova P, Hirsch C, Cappola AR. Longitudinal changes in thyroid function in the oldest old and survival: the cardiovascular health study all-stars study. J Clin Endocrinol Metab. 2012;97(11):3944-50. 11. Kaminski G, Makowski K, Michałkiewicz D, Kowal J, Ruchala M, Szczepanek E, et al. The influence of subclinical hyperthyroidism on blood pressure, heart rate variability, and prevalence of arrhythmias. Thyroid. 2012;22(5):454-60. 12. Sawin CT, Geller A, Wolf PA, Belanger AJ, Baker E, Bacharach P, et al. Low serum thyrotropin concentrations as a risk factor for atrial fibrillation in older persons. N Engl J Med. 1994;331(19):1249-52. 13. BiondiB,PalmieriEA,FazioS,CoscoC,NoceraM,SaccàL,etal.Endogenous subclinical hyperthyroidism affects quality of life and cardiac morphology and function in young and middle-aged patients. J Clin Endocrinol Metab. 2000;85(12):4701-5. 14. Petretta M, Bonaduce D, Spinelli L, Vicario ML, Nuzzo V, Marciano F, et al. Cardiovascular haemodynamics and cardiac autonomic control in patients with subclinical and overt hyperthyroidism. Eur J Endocrinol. 2001;145(6):691-6. 15. Auer J, Scheibner P, Mische T, Langsteger W, Eber O, Eber B. Subclinical hyperthyroidism as a risk factor for atrial fibrillation. Am Heart J. 2001;142(5):838-42. 16. Gammage MD, Parle JV, Holder RL, Roberts LM, Hobbs FD, Wilson S, et al. Association between serum free thyroxine concentration and atrial fibrillation. Arch Intern Med. 2007;167(9):928-34. 17. Vadiveloo T, Donnan P, Cochrane L, Leese GP. The Thyroid Epidemiology, Audit, and Research Study (TEARS): morbidity in patients with endogenous subclinical hyperthyroidism. J Clin Endocrinol Metab. 2011;96(5):1344-51. 18. Owecki M, Michalak A, Nikisch E, Sowinski J. Prolonged ventricular repolarization measured by corrected QT interval (QTc) in subclinical hyperthyroidism. HormMetab Res. 2006;38(1):44-7. 19. Biondi B, Palmieri E, Lombardi G, Fazio S. Subclinical hypothyroidism and cardiac function. Thyroid. 2002;12(6):505-10. 20. Sarma JS, Venkataraman K, Nicod P, Polikar R, Smith J, SchoenbaumMP, et al. Circadian Rhythmicity of rate-normalizedQT interval in hypothyroidism and its significance for development of class III antiarrhythmic agents. Am J Cardiol. 1990;66(12):959-63. 21. Aquino EM, Barreto SM, Benseñor IM, Carvalho MS, Chor D, Duncan BB, et al. Brazilian Longitudinal Study of Adult Health (ELSA-Brasil): objectives and design. Am J Epidemiol. 2012;175(4):315-24. 22. Kailajärvi M, Takala T, Grönros P, Tryding N, Viikari J, Irjala K, et al. Reminders of drug effects on laboratory tests results. Clin Chem. 2000;46(9):1395-400. 23. Mill JG, Pinto K, Griep RH, Goulart A, Foppa M, Lotufo PA, et al. Medical assessments and measurements in ELSA-Brasil. Rev Saude Publica. 2013;47(Suppl 2):54-62. 24. Prineas RJ, Crow RS, Blackburn HW. The Minnesota Code Manual of Electrocardiographic Findings: standards and procedures for measurement and classification. Boston, MA: John Wright; 1982. 25. Fedeli LG, Vidigal PG, Leite CM, Castilhos CD, Pimentel RA, Maniero VC, et al. Logistics of collection and transportation of biological samples and the organization of the central laboratory in the ELSA-Brasil. Rev Saude Publica. 2013;47(Suppl 2):63-71. 26. Pinto- Filho MM, Brant LCC, Padilha-da-Silva JL, Foppa M, Lotufo PA, Mill JG, et al. Electrocardiographic Findings in Brazilian Adults without Heart Disease: ELSA-Brasil. Arq Bras Cardiol. 2017;109(5):416-24. 27. Haugen BR. Drugs that suppress TSHor cause central hypothyroidism. Best Pract Res Clin Endocrinol Metab. 2009;23(6):793-800. 28. Carvalho GA, Perez CLS, Ward LS. The clinical use of thyroid function tests. Arq Bras Endocrinol Metab. 2013;57(3):193-204. 29. Denes P, Garsides DB, Lloyd-Jones D, GouskovaN, Soliman EZ, Ostfeld R, et al. Major andminor electrocardiographic abnormalities and their association with underlying cardiovascular disease and risk factors in Hispanics/Latinos (from theHispanic CommunityHealth Study/Study of Latinos). Am J Cardiol. 2013;112(10):1667-75. 30. Pinto-FilhoMM,BrantLCC,FoppaM,Garcia-SilvaKB,MendesdeOliveiraRA, deJesusMendesdaFonsecaM,etal.MajorElectrocardiographicAbnormalities According to the Minnesota Coding System Among Brazilian Adults (from the ELSA-Brasil Cohort Study). Am J Cardiol. 2017;119(12):2081-87. 31. Ribeiro AL, MarcolinoMS, Prineas RJ, Lima-CostaMF. Electrocardiographic abnormalities in elderly Chagas disease patients: 10-year follow-up of the Bambui Cohort Study of Aging. J AmHeart Assoc. 2014;3(1):e000632. 32. Camm AJ, Obel OA. Epidemiology and mechanism of atrial fibrillation and atrial flutter. Am J Cardiol. 1996;78(8A):3-11. 33. Collet TH, Gussekloo J, Bauer DC, den Elzen WP, Cappola AR, Balmer P, et al. Subclinical hyperthyroidism and the risk of coronary heart disease and mortality. Arch Intern Med. 2012;172(10):799-809. 34. Heeringa J, Hoogendoorn EH, van der Deure WM, Hofman A, Peeters RP, Hop WC, et al. High-normal thyroid function and risk of atrial fibrillation: the Rotterdam study. Arch Intern Med. 2008;168(20):2219-24. 35. Selmer C, Olesen JB, Hansen ML, Lindhardsen J, Olsen AM, Madsen JC, et al. The spectrum of thyroid disease and risk of new onset atrial fibrillation: a large population cohort study. BMJ. 2012 Nov 27;345:e7895. 36. Nanchen D, Gussekloo J, Westendorp RG, Stott DJ, Jukema JW, Trompet S, et al. Subclinical thyroid dysfunction and the risk of heart failure in older persons at high cardiovascular risk. J Clin Endocrinol Metab. 2012;97(3):852-61. 37. Davis PJ, Davis FB. Nongenomic actions of thyroid hormone on the heart. Thyroid. 2002;12(6):459-66.