Recent studies have shown consistent association between cardiovascular abnormalities and hyperthyroidism, calling attention on benignity of the condition which generally responds well to thyroid disease treatment. In this article we describe the case of a female patient with hyperthyroidism treated with radioiodine, which developed pulmonary hypertension, atrial fibrillation and valvular changes, showing significant improvement with methimazole therapy.

Keywords: Pulmonary hypertension; Hyperthyroidism; Methimazole