The Relation Between Thyroid Stimulating Hormone and Left Ventricular Strain Parameters in Patients with Subclinical Hypothyroidism

Objectives: In this study, it was aimed to evaluate the relationship between serum thyroid stimulating hormone (TSH) level and left ventricular strain parameters measured by the two-dimensional speckle tracking imaging among adults with subclinical hypothyroidism (SH). Materials and Methods: Forty patients with SH were divided into two groups according to TSH level (the first group: TSH values of 4.2-10.0 mIU/L; the second group: TSH values >10 mIU/L). Besides, 20 (control group) age- and gender-matched healthy subjects were included in the study as the control group. Standard echocardiographic measurements and the two-dimensional speckle tracking imaging measurements of apical two and four cavities, systolic peak longitudinal strain (PLS) from short-axis images, peak circumferential strain (PCS), global longitudinal strain and global circumferential strain were obtained. Results: Twenty patients were included in each group. In two-dimensional speckle tracking, PLS in the two-dimensional speckle tracking imaging was shown to be significantly lower (p