Chronic dizziness may be caused by various causes including migraine, minor head trauma, anxiety and disorders of the nervous system regulating autonomic functions.
An estimated 1.2% of people showing symptoms of dizziness every day and from 3.6% to 6% suffer from recurrent episodes of dizziness. In a significant percentage of cases the precise diagnosis is difficult, and thus the administration of the most appropriate treatment may not be achieved.
One form of chronic dizziness, chronic subjective dizziness, unrelated to dizziness and has been addressed by doctors for many years.
Patients with this syndrome have chronic nonspecific dizziness, subjective instability, hypersensitivity to irritation caused by the movement exacerbated in environments with complex visual stimuli such as large shops with large crowds or driving in rain.
In an interesting work, doctors from the University of Pennsylvania, studied 345 men and women aged 15-89 years (average age 43.5) who suffered from dizziness for three months or more, for unknown reasons. Patients were followed from 1998 to 2004, underwent multiple tests in a specialized center until it became possible to arrange diagnosis for their problem.
All patients except 6 turns placed diagnosis of diseases associated with psychiatric or neurological disorders.
Among the diagnoses entered included migraine, mild traumatic brain injury, primary or secondary anxiety disorders and dysautonomia neural origin. The dysautonomia is abnormality of the autonomic nervous system function that controls the body’s functions are performed independently, automatically, without being influenced by the individual’s will.
In 60% of the chronic dizziness cases, there was a correlation with anxiety disorders. In 38.6% of cases were related to disorders of the central nervous system which included migraine, mild brain injuries and diseases of the autonomic nervous system. In 6 patients (1.7%) for chronic dizziness, abnormalities responsible heart rate.
The results of this study give us important information about the pathological mechanisms that cause and perpetuate chronic dizziness. We see that two thirds of patients had organic medical problems associated with the onset of dizziness while the third, the primary cause was related to anxiety disorders. This means that chronic subjective dizziness, can have as a starting cause neural disorders affecting the ears or psychiatric disorders.
In conclusion, we will hold it in chronic subjective dizziness when audiological examination, the detailed search to detect key signs or symptoms associated with migraine, cerebral trauma or disorders of the autonomic nervous system, may help to better diagnosis.