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.
Heart failure causes reduced blood flow to the rest of your body. If the flow to your brain is lower than usual or your blood pressure is low, you may feel dizzy. Dizziness in people with heart failure is often caused by their medicines. However, irregular heartbeats, which often happen with heart failure, or a temporary drop in blood pressure, caused by rising from a sitting or lying position (postural hypotension), can also cause dizziness. You should discuss any dizziness with your doctor or nurse to identify its cause. Return to Symptoms.