A tilt test is a non-invasive method of study that assesses the changes produced in arterial pressure and cardiac frequency when the patient, strapped into a special bed, is tilted to a standing position for a prolonged period of time. It is indicated for studying patients with a sudden loss of consciousness (syncope), dizziness or impending fainting, without fainting actually occurring, and in the study of other alterations to the autonomous nervous system such as orthostatic arterial hypertension.