Define postural orthostatic tachycardia syndrome

Explanation:

Postural orthostatic tachycardia syndrome is related to the reduced blood volume that may be triggered when a person stands up after lying down. It has variety of causes, single treatment is not effective for every affected person. Its symptoms include fainting, light headedness, rapid heartbeat etc. which becomes normal after lying down. Increasing fluids intake, adding extra salt to the diet and medication can help.

answer; i believe the answer is moderate level;