[Circadian rhythms of thyroid hormones in patients with ischemic heart disease, arterial hypertension, and atrial fibrillation].

Aim: To evaluate the interrelationship between diurnal changes in thyrotropic hormone (TTH), free triiodothyronine (FT3), and clinical features of IHD in combination with AH and atrial fibrillation (AF).

Materials And Methods: Levels of TTH, FT3, and plasma cortisol were measured in 133 patients with IHD and AH with or without paroxysmal AF. The studied indexes included duration of IHD, AH, and AF; presence or absence of AF and AH; incidence rate of AF episodes per week; severity of exertional angina; systolic and diastolic BP; and EchoCG data.