THYROID DISORDERS

Abstract

Background: Thyroid hormones have many effects on cardiovascular function,and deficiency or excess of thyroid hormones can result in cardiac dysfunction. Abnormalitiesof the cardiovascular system are often identified during examination of hyperthyroid andhypothyroid patients. Objective: The aim of this study was to address the effects of thyroidhormones on the cardiovascular system and the clinical relevance of the cardiovascularresponse to thyroid dysfunction. Study Design: Cross sectional study. Setting: The studywas conducted at Allied Hospital / Punjab Medical College Faisalabad and PINUM HospitalFaisalabad. Period: October 2014 to August 2015. Materials and Methods: Total 100 patientswith thyroid disease (Hypo/hyperthyroidism) were enrolled in the study. Any patient age ≥20years, that had documented history of thyroid disease (Hypothyroidism or hyperthyroidism) oron medications for thyroid disorder was recruited in this study. Results: Total 100 consecutivepatients with abnormal thyroid function tests who fulfill the inclusion and exclusion criteriawere enrolled in the study. Mean age was 47.9 ± 23.20 years. 16 % were male and 84%were female. Majority of the patients 37( 37%) were in age group 51 - 60 years. 53 % weresuffering from overt hyperthyroidism and 31 % were suffering from hypothyroidism. Subclinicalhyperthyroidism and hypothyroidism was present in 7% and 9% patients respectively. Goiterwas present in 24 % patients. Atrial fibrillation was observed in 34% hyperthyroid patients.Overall 23% were diabetics and 25% had H/O hypertension. Dyslipidemia was present in20% hyperthyroid and 25% hypothyroid patients. Echocardiography was performed in 19%patients. 7% patients undergone thyroid surgery. Overall 11% patients were suffering from CCF.Pulmonary hypertension was observed in 17% hyperthyroid and 35.48% hypothyroid patients.MeanFT4 in hypothyroid patients was 1.16±022 ng/dl. Mean TSH was 10.92±21.09 (μIU/ml)in hypothyroid and 0.19±0.14 (μIU/ml) in hyperthyroid patients. Conclusions: The outcomeof this study suggests that patients with untreated overt / subclinical thyroid dysfunction are atincreased risk of cardiovascular complications.