autonomic nerve function test
Autonomic nervous system testing focuses on the nerve connections between the brain, heart and other organs. Non-invasive testing checks for imbalances that control autonomic processes that include heart rate, blood pressure, gastrointestinal function and sweating.Autonomic nervous system testing may be used to evaluate and treat: 1  Recurrent fainting and syncopy. 2  Dysautonomia.on-invasive testing checks for imbalances that control autonomic processes that include heart rate, blood pressure, gastrointestinal function and sweating.