Abstract
Within the first 36 hours following myocardial infarction, serum total thyroxin (T4) levels were supernormal in most cases in contrast to normal thyrotrophic values. After one week, T4 levels dropped to normal while TSH values rose significantly. These findings suggest that, in the acute phase of myocardial infarction, the secretion of thyroid hormones is increased, thereby inhibiting the pituitary thyrotropes. The stimulation of thyroid secretion might be due to the high levels of blood catecholamine generally found in patients with myocardial infarction.
Key words
Myocardial Infarction - Thyroid Function - Serum Total Thyroxine - Serum TSH
