Evaluation of heart rate variability, QT dispersion, and Tp-e interval in pediatric subclinical hypothyroidism.

Background: Clinical effects of subclinical hypothyroidism are not clearly understood. This study aims to investigate the effects of subclinical hypothyroidism (SH) on cardiac autonomic and conduction systems in children.

Methods: Forty-seven cases (25 female, 22 male) with SH aged between 3 and 17 years and 46 controls that were age, body mass index and sex matched, were included in the study.