ANS controls involuntary biological functions such as beating of heart, widening and constriction of blood vessels (endothelial system), respiration and digestion. This test measures how well the sympathetic and parasympathetic systems are working together. They provide a more comprehensive view of patients’ health as compared to individual biomarkers.
Dysregulation of ANS can reflect underlying diseases. Lack of coordination between sympathetic and parasympathetic branches, as well as imbalance or excess of either, can drive numerous perplexing symptoms and can represent significant health risks.