dorifish1, please watch this recording of Dr. Horowitz about
POTS, from the moment i pinned
/youtu.be/uj0H3T9HMeQ?t=2818He talks about
POTS again later in his presentation, so you can watch the whole thing.
Also take a look at this section on Wikipedia
/en.wikipedia.org/wiki/Postural_orthostatic_tachycardia_syndrome#Treatment