Patients with intractable angina: free thyroxine index, immunoreactive insulin and free fatty acids in blood, free adrenaline and noradrenaline in urine.

The activity of adrenergic system, thyroid gland and blood levels of insulin and FFA were studied in 120 patients with intractable angina. Noradrenaline excretion was normal but that of adrenaline was augmented in a vast majority of patients and even doubled in 27% of cases. Free thyroxine index values were abnormally high in 22% of cases and inversely correlated with ergometric performance.