[Myocardial involvement in hyper- and hypothyroidism]

The paper is devoted to early myocardial pathology in patients with hyper- and hypothyroidism (15 patients with diffuse toxic goiter and 18 patients with primary hypothyroidism). They were investigated by radionuclide scintigraphy of the myocardium with -201TlCl. The myocardium in thyroid pathology was shown to suffer from dystrophic disorders, determined by metabolic derangements. The absence of disturbed perfusion processes in the myocardium and a diffuse decrease in metabolic activity of cardiomyocytes were revealed. Similar changes were found in patients without signs of myocardial involvement on ECG.