Specialized Laboratory for Autonomic Function Diagnostics
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Autonomic function diagnostics examine the autonomic nervous system, which unconsciously regulates bodily functions such as heartbeat, blood pressure, breathing, and digestion. Using specialized tests, imbalances between the sympathetic nervous system (stress activation) and the parasympathetic nervous system (recovery) can be identified.
Functional disturbances of the autonomic nervous system occur in a wide range of neurological conditions, such as traumatic brain injury, attention disorders, multiple sclerosis, Parkinson’s syndromes, and polyneuropathies. Typical symptoms include dizziness, light-headedness, headaches, “brain fog,” fatigue, stress-related complaints, and orthostatic issues.
Autonomic function diagnostics complement clinical neurological assessments by specifically investigating whether dysfunctions of the autonomic nervous system are present that may be responsible for stress-induced symptoms.
The tests include:
- Active orthostatic test: This procedure assesses the function of the autonomic nerves in the cardiovascular system by measuring changes in blood pressure and heart rate in lying and standing positions. These measurements provide insight into the body’s adaptability to positional changes.
- Heart rate variability analysis: This test records changes in heart rate during various conditions such as rest, deep breathing, rapid standing, and straining. The results offer information about the functioning of the autonomic nerves that regulate the heartbeat.
- Sudomotor test: Using the Sudoscan device, skin blood flow in the fingers or toes is measured during controlled deep breathing. The analysis of these results helps identify potential dysfunctions of the autonomic nerves that control skin perfusion.
- Exercise test: Based on an individually adapted protocol, we assess the cardiovascular system’s response to physical exertion using a bicycle ergometer.
If functional disturbances are detected, a targeted, personalized training program can help relieve symptoms and improve the balance between the sympathetic and parasympathetic nervous systems. In our lab, we offer individually tailored training programs based on the results of autonomic function diagnostics. These measures support the stabilization of circulation and heart rate and contribute to the improvement of symptoms such as dizziness, fatigue, and orthostatic issues.
Our Services
In the Autonomic Laboratory, we analyze the regulatory mechanisms of the autonomic nervous system under various conditions. This includes the assessment of blood pressure and heart rate changes in the following situations:
– At rest
– During deep breathing
– While holding the breath (Valsalva maneuver)
– Under controlled physical stress (e.g., Schellong test, bicycle ergometer test)
Examination Procedure
Heart Rate Variability Test
Measurements are taken while lying in a relaxed position, with continuous monitoring of cardiovascular parameters.
Tests include:
• Respiratory Rhythm Test: Breathing at a prescribed rhythm.
• Valsalva Maneuver: Forceful exhalation into a special mouthpiece.
• Rapid Standing Test: Observing circulatory response upon standing quickly.
Handgrip Test
This test evaluates autonomic regulation under static strain. Using a handgrip device, the patient applies maximum force for several minutes while circulatory parameters are continuously monitored.
Bicycle Ergometer Test
This test analyzes the body’s response to physical exertion. After a resting phase, a stepwise exercise test is performed on a bicycle ergometer with continuous monitoring. The test is concluded when the patient reaches their exertion limit or experiences symptoms, followed by a recovery phase.
Preparation for the Examination
To ensure meaningful results:
• Avoid caffeine, alcohol, and energy drinks for 24 hours before the test.
• Refrain from intense physical activity the day before.
Our Medical Offices
Neurozentrum Stadelhofen
Gottfried-Keller-Strasse 5,
8001 Zürich