Assessment of morphological and functional parameters of myocardium in patients with coronary artery disease and overt primary hypothyroidism

Aim. To evaluate the morphological and functional parameters of the myocardium in patients with coronary artery disease (CAD) and concurrent overt primary hypothyroidism, as well as to identify possible relationships between these parameters and levels of thyroid hormones.

Methods. 344 patients with CAD who had verified classes 1-3 stable angina pectoris using the clinical guidelines were recruited in a study [6]. 100 patients with CAD and concurrent primary hypothyroidism were enrolled in the study group. 244 patients with CAD were enrolled in the comparison group. Severity of stenosis in one- and/ or two- and/or three-vessel disease were measured in all patients. A comparative assessment of biochemical parameters and echocardiography was performed. A single-stage cross-sectional comparative analysis of the studied parameters was performed. The presence of any relationships of thyroid hormones with morphological and functional parameters of the myocardium were determined. The correlation analysis reported the relationships between diastolic dysfunction, left ventricular ejection fraction and thyroid-stimulating hormone levels in patients with CAD and concurrent hypothyroidism.

Results. Statistically significant differences in lipid profile, glucose levels, glycated hemoglobin, and glomerular filtration rate were found. Three-vessel disease prevailed in both groups, but the prevalence of three-vessel disease was higher in the study group (CAD and hypothyroidism) than in the comparison group (p<0.01). Echocardiography assessment reported the differences in the levels of E/a (p = 0.02), E/E` (p = 0.001), and LVEF (p = 0.001) between the study groups.

Conclusion. Patients with coronary artery disease and concurrent overt primary hypothyroidism demonstrated worse dyslipidemia parameters, glycemic indicators and impaired glomerular filtration rate. Three-vessel disease prevailed among patients enrolled in the study. The relationship between TSH and myocardial morphological and functional parameters was determined. Obtained data can be used for assessing the prognosis in this group of patients.

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