
Keywords: سهیمیه تریرونین آزاد; FT3; free triiodothyronine; FT4; free thyroxine; HF; high-frequency; HRV; heart rate variability; HT; hyperthyroidism; LF; low-frequency; LVEDD; left ventricular end-diastolic diameter; LVEF; left ventricular ejection fraction; pNN50; percent of successiv