This may be a stupid question:

First off, let me say that I don’t have access currently to a POTS specialist, and my treatment team is mostly cardiologists and some input from my PCP because he’s one of the few doctors who typically takes the time to really listen and try new things. Although I like them all, they don’t always know how to answer some of my questions, so I thought I’d see if anyone could explain something better to me. So if I’ve understood POTS correctly, the main issue is that our bodies don’t correct blood pooling due to gravity correctly, which causes the tachycardia to try and pump out more oxygenated blood. The beta blockers just help relieve the tachycardia, right? Doesn’t that still leave the issue of low oxygen perfusion? I know the increased fluid and salt intake helps increase blood volume, but if that was enough to fix it, we wouldn’t still have the tachycardia in the first place. Am I missing something? Sorry if that sounds confusing, maybe the brain fog is just making me dumb today. 😂