Can a cardiac ultrasound detect thyrotoxic heart disease?

Written by Li Hai Wen

Cardiology

Updated on February 23, 2025

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Cardiac ultrasound examinations cannot directly diagnose hyperthyroid heart disease, which often leads to an enlargement of the heart and a reduction in cardiac pumping function. Cardiac ultrasound can detect these structural changes in the heart caused by hyperthyroidism and can assess heart function, but it cannot determine if these are caused by an overactive thyroid. A combination of blood tests for thyroid function or a thyroid ultrasound is needed for a comprehensive diagnosis. If the thyroid ultrasound shows a rich blood flow in the thyroid region, appearing flame-like, or if the blood tests show a significant decrease in thyroid-stimulating hormone, in conjunction with cardiac ultrasound, it can confirm the presence of hyperthyroid heart disease.

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Heart disease is caused by various factors that invade the heart, resulting in the loss of its normal physiological functions. Common causes of heart disease include rheumatic heart disease, congenital heart disease, viral myocarditis, coronary artery disease, and pulmonary heart disease. These diseases are considered organic heart diseases, caused by various reasons that lead to pathological changes in the heart's muscles, valves, etc., losing the heart's normal ability to pump blood and supply the body with blood.

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Cor pulmonale refers to a disease characterized by increased pulmonary vascular resistance due to pathologies of the bronchi, lung tissue, chest wall, and blood vessels of the lungs, leading to pulmonary arterial hypertension and structural and functional changes in the right ventricle. The common clinical symptoms of cor pulmonale include coughing, expectoration, shortness of breath, significant palpitations, and breathing difficulties after physical activity, reduced work capacity, and exacerbation of the above symptoms during acute infection phases. Some patients may experience chest pain and hemoptysis. The second set of symptoms relates to heart and lung function, manifesting during the decompensation phase. For instance, some patients may develop respiratory failure, and experience headaches, decreased appetite, drowsiness, significant edema in the lower extremities, and further symptoms such as arrhythmias, anorexia, abdominal distension, and nausea.

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Can a cardiac ultrasound detect thyrotoxic heart disease?

Cardiac ultrasound examinations cannot directly diagnose hyperthyroid heart disease, which often leads to an enlargement of the heart and a reduction in cardiac pumping function. Cardiac ultrasound can detect these structural changes in the heart caused by hyperthyroidism and can assess heart function, but it cannot determine if these are caused by an overactive thyroid. A combination of blood tests for thyroid function or a thyroid ultrasound is needed for a comprehensive diagnosis. If the thyroid ultrasound shows a rich blood flow in the thyroid region, appearing flame-like, or if the blood tests show a significant decrease in thyroid-stimulating hormone, in conjunction with cardiac ultrasound, it can confirm the presence of hyperthyroid heart disease.