Impact of subclinical hypothyroidism treatment in systolic and diastolic cardiac function

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.

Bibliographic Details

Main Authors:	Martins,Ricardo Mendes, Fonseca,Regina Helena Alves, Duarte,Marta Maria Turano, Reuters,Vaneska Spinelli, Ferreira,Márcia Martins, Almeida,Cloyra, Buescu,Alexandru, Teixeira,Patrícia de Fátima dos Santos, Vaisman,Mario
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Endocrinologia e Metabologia 2011
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0004-27302011000700005
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