1.
Braz. j. med. biol. res
;
23(2): 195-7, 1990. ilus
Article
in English
| LILACS
| ID: lil-85158
ABSTRACT
The efferent activity of the parasympathetic component of the autonomic nervous system was evaluated by measuring the magnitude of the respiratory sinus arrhythmia in 3 female patients with hyperthyroidism (Basedow-Graves' disease) before and after treatment. The heart rate variations induced by the test increased in all patients after treatment of thyrotoxicosis (from 15 + or - 2.9 to 28.3 + or - 6.6 beats/min; mean + or - SEM) with propylthiouracil (600 mg/day). This result confirms our previous observations indicating an important and reversible impairment of the efferent vagal activity in human hyperthyroidism