[Impairment of cardiovascular function in subclinical hypothyroidism].

Subclinical hypothyroidism (SH) is the most frequent thyroid disease, but administration of replacement L-thyroxin in it is not obvious. SH may present both with general nonspecific symptoms and disturbance of lipid metabolism, myocardial dysfunction. Many physicians think it valid to restore euthyroid condition, as it may improve general condition of the patients, diastolic and systolic myocardial function, prognosis in ischemic heart disease. However, there are no definite indications to starting L-thyroxin in SH.