ABSTRACT
The changes in left ventricular function and hemorrheology were investigated serially before and after treatment with thyroid tablets in 32 cases of primary hypothyroidism. It was found that cardiac function was impaired and hemorrheology was disturbed in all of these patients before treatment, but they recovered to normal range when hypothyroid state was corrected. It was found that there was a good correlation between cardiac function and blood level of thyroid hormone, presence of thyroid auto-antibodies, as well as disturbance of hemorrheology. These facts suggested that blood level of thyroid hormone and hemorrheology might act as two indirect indicators in the prediction of left ventricular function in patients with primary hypothyroidism.