Autonomic nerve function tests. Reference values in healthy subjects

Clin Physiol. 1986 Dec;6(6):523-8. doi: 10.1111/j.1475-097x.1986.tb00785.x.


Autonomic nerve function was evaluated by deep breathing (E/I heart rate ratio) and tilt table tests (acceleration index, brake index, and blood pressures) in 56 healthy subjects in order to find reference values. The results showed that the E/I ratio, the acceleration index and the brake index fell with increasing age. There was no influence of age on the systolic and the diastolic blood pressure reactions to tilt. Age-related reference values are needed in the evaluation of autonomic neuropathy indices.

MeSH terms

  • Adolescent
  • Adult
  • Aging / physiology*
  • Autonomic Nervous System / physiology*
  • Blood Pressure
  • Female
  • Heart Rate
  • Humans
  • Male
  • Middle Aged
  • Posture
  • Reference Values
  • Respiration