In North America, the DSM-IV or DSM-5 criteria are often used for diagnosis, while European countries usually use the ICD-10. With the DSM-IV criteria a diagnosis of ADHD is 3â4 times more likely than with the ICD-10 criteria. It is classified as neurodevelopmental psychiatric disorder.
In orthostatic hypotension, the blood pressure drops when the body is in an upright standing position, as compared to a reclining position. Sometimes the sudden dip causes a brief dizzy spell or head rush. In severe cases it may cause a person to faint. âSometimes people can have it and not feel a thing,â Jones says.n orthostatic hypotension, the blood pressure drops when the body is in an upright standing position, as compared to a reclining position. Sometimes the sudden dip causes a brief dizzy spell or head rush. In severe cases it may cause a person to faint. âSometimes people can have it and not feel a thing,â Jones says.
However, if the blood pressure is too low, it can affect blood flow around the body making a person feel dizzy or unsteady. Sudden drops in blood pressure most commonly occur in someone who's rising from a prone or sitting position to standing.