A tilt test may be helpful for patients who have recurrent fainting spells (syncope). This test shows how your heart rate and blood pressure respond to a change in position from lying down to standing up. In this test, an intravenous line (a small plastic tube in a vein) is usually started. A catheter also may be placed in the artery to monitor blood pressure. In some cases medications are given through the intravenous line. If a cause of the fainting spells is found, medications can be given through the intravenous line to help prevent the episodes. This information will help your doctor find the best way to treat these episodes.