Final answer:
Orthostatic hypotension is another name for postural hypotension, which is a drop in blood pressure when standing up. It can cause dizziness or fainting due to the adjustment the cardiovascular system has to make to keep blood flowing to the head.
Step-by-step explanation:
Orthostatic hypotension, also known as postural hypotension, is a medical condition in which a person experiences a drop in blood pressure when standing up. This can lead to dizziness or fainting. The cardiovascular system has to adjust to the change in position by keeping blood flowing to the head against the force of gravity pulling it down into the legs.