Why it's done

Your doctor might recommend a tilt table test to try to trigger your signs and symptoms — lightheadedness, dizziness or fainting — while your heart rate and blood pressure are being monitored.

Your nervous system controls your heart rate and blood pressure. It may suddenly lower your heart rate and blood pressure for a short time when you're moved to an upright position during the tilt table test. As a result, less blood flows to your brain, possibly causing you to faint.