Daxor Corporation announced new data demonstrating the clinical utility of the BVA-100 blood test in postural tachycardia syndrome (POTS) published in the Journal of the American College of Cardiology from the Vanderbilt Autonomic Dysfunction Center in Nashville, TN. The study titled “Effect of High Dietary Sodium Intake in Patients with Postural Tachycardia Syndrome,” tested whether high sodium diet reduces orthostatic tachycardia (heart rate) and upright heart rate compared to low sodium diet in POTS patients and secondary, its effect on plasma volume and plasma norepinephrine. Blood volume parameters were measured with Daxor’s BVA-100 diagnostic blood test; a safe, accurate and objective means to directly quantify blood volume and composition. Blood volumes were expressed as a percent deviation from the patient’s ideal volumes. The results showed that the mechanism of sodium intake directly affects intravascular blood volume as measured by the BVA-100 blood test. High dietary sodium compared to low dietary sodium increases plasma volume and decreases the heart rate supporting the recommendation to increase dietary sodium intake in POTS.