Management of Hypervascular Thyroid

Diagnosis and Assessment

Cross-sectional imaging (CT or MRI) is more definitive than radiography for localizing thyroid lesions and can help distinguish hypervascular thyroid from other hypervascular mediastinal masses 3

The American College of Cardiology recommends beginning with beta-blockers (such as atenolol or propranolol) to control heart rate, reduce tremors, and mitigate cardiovascular complications 1, 2
The goal of beta-blocker therapy is to lower heart rate to nearly normal, which will improve the tachycardia-mediated component of ventricular dysfunction 1
Beta-blockers provide rapid improvement in cardiac and neurological symptoms while the definitive treatment takes effect 1
Antithyroid medications, such as thionamides (methimazole or propylthiouracil), can be used to control hyperthyroidism 2
Radioactive iodine therapy may be considered for definitive treatment in appropriate candidates and can lead to reduction in thyroid vascularity as gland function decreases 2, 4

Hyperthyroidism causes decreased systemic vascular resistance, increased cardiac output, and potential pulmonary artery hypertension 4, 5
In patients over 50 years of age, prompt recognition and management of cardiac manifestations are crucial, as cardiovascular complications are the chief cause of death after treatment of hyperthyroidism 1, 5
Heart failure may develop in severe, long-standing hyperthyroidism, often in conjunction with persistent tachycardia or rapid atrial fibrillation 4, 5