Objective: The aim of our study was to evaluate the short term effects of Propanolol on heart rate variability in patients with hyperthyroidism.~Design: In ten patients newly diagnosed as having hyperthyroidism and naïve of all treatment specific for hyperthyroidism, we evaluated the short term effects of Propanolol on heart rate variability (HRV).~Methods: We measured heart rate variability by power spectral analysis during 2 hours of rest and during Ewing's tests before and after the administration of Propanolol 40mg/12 hours orally for 72 hours. Other outcomes included mean heart rate, mean R-R interval during 2-hour rest.~The study questions the systematic adjunction of Propanolol early in the treatment of hyperthyroidism.
Objective: The aim of our study was to evaluate the short term effects of Propanolol on heart rate variability in patients with hyperthyroidism.~Design: In ten patients newly diagnosed as having hyperthyroidism and naïve of all treatment specific for hyperthyroidism, we evaluated the short term effects of Propanolol on heart rate variability (HRV).~Methods: We measured heart rate variability by power spectral analysis during 2 hours of rest and during Ewing's tests before and after the administration of Propanolol 40mg/12 hours orally for 72 hours.