Most of us don’t think twice about standing up. Yet for people affected by a disorder called postural orthostatic tachycardia syndrome (POTS), the simple act of standing can provoke lightheadedness and a racing heartbeat. This post discusses diagnosis, treatment, and living with POTS.
https://www.health.harvard.edu/blog/pots-diagnosing-and-treating-this-dizzying-syndrome-202110062611

