Association between hyperthyroidism and thromboembolism: A retrospective observational study.

Area of Science:

• Endocrinology
• Hematology
• Internal Medicine

Background:

• Thyroid gland diseases, particularly hyperthyroidism, are prevalent globally and can lead to various health issues.
• While not traditionally considered a primary risk factor, emerging evidence suggests a link between hyperthyroidism and thromboembolic events.
• Understanding this association is crucial for comprehensive patient management.

Purpose of the Study:

• To investigate the relationship between thyroid hormone levels and the incidence of venous thrombosis (VT).
• Specifically, to examine associations with deep vein thrombosis (DVT), pulmonary embolism (PE), and cerebral VT.
• To determine if thyroid-stimulating hormone (TSH) and free T4 levels correlate with VT occurrence in hyperthyroid patients.

Main Methods:

• An observational retrospective study was conducted on outpatients diagnosed with hyperthyroidism.
• Exclusion criteria included bedridden status, recent surgery, oral contraceptive use, and anticoagulant therapy.
• Symptomatic VT cases were objectively confirmed, and thyroid hormone levels were analyzed.

Main Results:

• The study included 300 hyperthyroid patients (80% female, mean age 42.3 years).
• A significant association was found between TSH levels and the overall risk of DVT, PE, and cerebral embolism.
• Free T4 levels were significantly associated with the risk of DVT and PE, but not cerebral embolism.

Conclusions:

• The findings support a significant association between hyperthyroidism and the development of venous thrombosis.
• Hyperthyroidism should be considered an additional risk factor for VT.
• Further research may elucidate the precise mechanisms linking thyroid dysfunction and thrombosis.