i’ve never fainted! i was first diagnosed with POTS, but tbh i think i have some other type of dysautonomia. i haven’t started reading it yet, but check out the book “the dysautonomia project” - it’s kinda cool, it lists things both for providers (more medical speak and stuff) and for patients
it doesn’t always involve fainting! the diagnostic criteria is based on changes in heart rate, usually a sustained increase in heart rate of 30bpm+, or over 120bpm, within 10 minutes of standing up. it also includes symptoms like lightheadedness, tremor, weakness, vision changes, and fatigue that kick up when you stand up and are relieved by lying down. in my case, i just stood up from a car ride home from work, it was 90° outside so i was already feeling bad, and then my heart rate increased -