Hypertrophic cardiomyopathy and thyroid diseases.

The incidence ratio of thyrotoxicosis among 14 patients with thyroid diseases associated with hypertrophic cardiomyopathy was compared with that in 7686 patients with thyroid diseases, to find the possible correlation between thyrotoxicosis and hypertrophic cardiomyopathy. Thyrotoxicosis did not predominate over other thyroid diseases in the 14 patients with hypertrophic cardiomyopathy. Thus, the occurrence of hypertrophic cardiomyopathy does not appear to be associated with thyrotoxicosis.