A tilt table can show that something goes wrong when you stand. It rarely shows why. Start with how POTS gets diagnosed, then why results can look normal while you feel awful, and what else our team measures, including blood flow to your brain.
What happens on a tilt table test for POTS, how long it takes, why some labs give nitroglycerin, what the results mean and whether you need one at all.
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Autonomic testing for POTS checks heart rate, blood pressure and sweat nerve reflexes. Learn what each test measures, what results mean and what they miss.
POTS and OCHOS share one core problem: reduced cerebral blood flow. The 30 BPM threshold dividing them is a 40-year-old artifact, not a biological boundary.
If your blood pressure looks normal and your heart rate doesn't quite qualify, you've been told nothing is wrong. Here's what the standard test misses.
A 2024 study of 2,627 patients found POTS and dysautonomia symptom surveys don't match objective autonomic testing. Here's what that gap really means.
Free guide: the 4 mechanisms your doctors aren't testing for, and how to find which one is keeping you sick. From The Keiser Clinic.
Why so many POTS cases get dismissed, why clean labs don't mean you're fine, and how a brain-first approach finds what standard workups miss.
Orthostatic cerebral hypoperfusion syndrome (OCHOS) is a measurable drop in brain blood flow on standing. Learn how it differs from standard POTS.
A POTS diagnosis can be a relief, but for many the treatments still don't work. Here's why, and what understanding your specific mechanism changes.
A transcranial Doppler tracks how fast blood moves to your brain as you're tilted upright, and shows whether it drops in POTS and by how much.
Low CO2 narrows brain arteries and cuts blood flow. Here are the symptoms, the causes, how it's measured on a tilt test and what the research says about raising it.
Hypocapnia (low CO2) narrows brain arteries. On standing, that's HYCH: POTS symptoms without the heart rate jump. Here's how the clinic tests and treats it.
The bedside neurological exam our team pairs with autonomic testing: pulses, reflexes, eye movements, and what each reveals about POTS and dysautonomia.
Eye movement testing shows which brain circuits may be underperforming. See what jumpy tracking can mean, one patient's story, and how our team uses it.
Proof that the brain controls the autonomic system, using eye movements, cerebral blood flow data, and real patient outcomes from targeted brain rehab.
When unequal pupils after a head injury mean calling 9-1-1 or going to the ER, how common a harmless difference is, and what concussion does to both pupils.
ME/CFS isn't just fatigue. How chronic fatigue syndrome is properly diagnosed, what testing reveals about the brain, and why finding the mechanism matters.
CFS, POTS, and ME/CFS syndrome labels describe symptoms, not causes. Moving from syndrome to mechanism is the key to effective treatment.
POTS or anxiety? How to tell which comes first, why POTS is so often misdiagnosed as anxiety, what testing shows, and a case where the body led.
FND and POTS can show up together. What FND is, how it differs from POTS, why standing can make FND symptoms worse, and what a tilt test can show.
POTS and ME/CFS can overlap, and a normal heart rate on a tilt can hide falling brain blood flow. Here's how our team separates them by mechanism.
How to know if your POTS is actually improving using cerebral blood flow data, not just symptoms. A case study shows why BP meds may worsen perfusion.
To see the testing itself, take the 3D tour of autonomic testing.
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