The autonomic nervous system plays an important role in regulating the internal environment, helping the body respond and adapt to changes and impacts from the environment and directly affecting important functions such as heart rate, blood pressure, digestion, respiration, etc.

Test of heart rate response by Valsalva maneuver helps patients with tachycardia, corrects disorders as well as limits complications caused by tachycardia. In addition, the Valsalva test is also effective in diagnosing autonomic nervous system disorders, treating tinnitus...