They’re young and athletic. They’re also ill with a condition called POTS. postural orthostatic tachycardia syndrome | Physical and Mental Health - Exercise, Fitness and Activity | Scoop.it
From www.washingtonpost.com - April 10, 7:38 PM
Short for postural orthostatic tachycardia syndrome, POTS is diagnosed when a patient’s heart rate goes berserk, jumping way above normal when changing position from lying down to standing.