Postural hypotension is also known as?

Hypotension is a medical term used to describe low blood pressure. Orthostatic hypotension, also known as postural hypotension, is a type of low blood pressure that occurs after sitting or lying down and while getting up. 

Orthostatic hypotension is indicated by a drop of 20 mm Hg in the top number (systolic blood pressure) within 2 to 5 minutes of standing. Orthostatic hypotension is also present when the diastolic blood pressure drops by 10 mm Hg during 2 to 5 minutes of standing.