2004
DOI: 10.1590/s0004-27302004000100016
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Disfunções mínimas da tiróide: hipotiroidismo subclínico e hipertiroidismo subclínico

Abstract: Subclinical hypothyroidism (SHT) and subclinical hyperthyroidism (SCH) are defined as normal serum free T4 and T3 levels associated with elevated (SHT) or subnormal (SCH) serum TSH levels, respectively. Symptoms and signs of thyroid dysfunction are scarce. The prevalence is low. In SHT, total cholesterol and LDL-C are modestly elevated and levothyroxine may influence the lipids levels. There is decreased cardiac contractility and increased peripheral vascular resistance that improve with treatment. SCH is asso… Show more

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Cited by 17 publications
(18 citation statements)
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“…Subclinical hypothyroidism is relatively prevalent in the general population, especially among women and the elderly, and both subclinical thyroid dysfunctions are associated with detrimental effects on the cardiovascular system (Romaldini et al 2004, Duggal et al 2007, Donangelo & Braunstein 2011. Subclinical hypothyroidism is characterized by decreased cardiac contractility; increased peripheral vascular resistance; abnormal lipid metabolism; cardiac dysfunction; diastolic hypertension, which confers an elevated risk of atherosclerosis; and ischemic heart disease (Mikhail et al 2008, Ochs et al 2008, Ashizawa et al 2010, Razvi et al 2010, Cai et al 2011.…”
Section: New Ras Componentsmentioning
confidence: 99%
See 1 more Smart Citation
“…Subclinical hypothyroidism is relatively prevalent in the general population, especially among women and the elderly, and both subclinical thyroid dysfunctions are associated with detrimental effects on the cardiovascular system (Romaldini et al 2004, Duggal et al 2007, Donangelo & Braunstein 2011. Subclinical hypothyroidism is characterized by decreased cardiac contractility; increased peripheral vascular resistance; abnormal lipid metabolism; cardiac dysfunction; diastolic hypertension, which confers an elevated risk of atherosclerosis; and ischemic heart disease (Mikhail et al 2008, Ochs et al 2008, Ashizawa et al 2010, Razvi et al 2010, Cai et al 2011.…”
Section: New Ras Componentsmentioning
confidence: 99%
“…Subclinical hypothyroidism is characterized by decreased cardiac contractility; increased peripheral vascular resistance; abnormal lipid metabolism; cardiac dysfunction; diastolic hypertension, which confers an elevated risk of atherosclerosis; and ischemic heart disease (Mikhail et al 2008, Ochs et al 2008, Ashizawa et al 2010, Razvi et al 2010, Cai et al 2011. For its part, subclinical hyperthyroidism is associated with atrial fibrillation, increased cardiac contractility and left ventricular mass, and diastolic and systolic dysfunction, and these patients are almost threefold more likely to suffer atrial fibrillation (Romaldini et al 2004, Duggal et al 2007, Donangelo & Braunstein 2011. Only one study has analyzed RAS activity in these subclinical thyroid disorders, finding no differences in PRA or plasma aldosterone between patients with subclinical hypothyroidism and normal individuals (Sahún et al 2001).…”
Section: New Ras Componentsmentioning
confidence: 99%
“…De acordo com artigos recentes de revisão (14,15), há uma diminuição na contratilidade do miocárdio em pacientes acometidos pelo HS. Entretanto, nas pacientes estudadas na presente análise, essa disfunção sistólica não acometeu valores aferidos em repouso, sendo a PAS pré-teste média de 120,66 mmHg, ou seja, encontra-se dentro da faixa de normalidade.…”
Section: Parâmetros Hemodinâmicosunclassified
“…Nas faixas etárias mais avançadas, tal prevalência pode chegar a 15-20%. A evolução para hipotireoidismo franco ocorre em 2 a 5% ao ano, sendo proporcional ao nível de TSH e maior na presença de anticorpos anti-tireóide [7][8][9][10] …”
unclassified