Clinician handoff
Hypoperfusion
Designed for a 60-second scan in primary care. Use this to explain why this theory fits, what would weaken it, and which tests are most worth discussing.
Why this still fits
I want to evaluate whether reduced cerebral perfusion is driving my brain fog. The strongest clue is that the fog is worse upright and improves when I lie down or get circulation back.
What would weaken it
- -Does the fog reliably worsen with standing, heat, showers, or large meals and improve lying flat?
- -Do you get tunnel vision, grey-outs, near-fainting, or cold hands when the fog spikes?
- -Is this better explained by hypoperfusion than by anxiety, long COVID, or sleep apnea?
- -Does the pattern reflect low blood pressure or low cerebral flow rather than just tachycardia?
Key points to communicate
- •Please document what findings would confirm this cause versus lower confidence.
- •I want an evidence-first workup with clear follow-up criteria.
- •Please note which competing causes should be checked in parallel if results are inconclusive.
- •Please separate metabolic, sleep, autonomic, and medication overlap before narrowing to one cause.
Tests and measurements to discuss
Need the fuller context? Use the test explainers for the measurement itself, or jump back to the tests section on the Hypoperfusion page to see how the tests fit the whole pattern.
Orthostatic vitals
What this helps clarify: Combined HR and BP measurements with position
Range context
Stable BP/HR
How to use the result
Save the result with date and symptoms from the same week.
Tilt-table or standing test if needed
What this helps clarify: At-home POTS screening — 10-minute standing test
Range context
HR rise <30 bpm
How to use the result
Save the result with date and symptoms from the same week.
Assessment of low blood pressure / perfusion contributors
Cerebral Perfusion Assessment
Used to rule in or rule out Hypoperfusion.
What this helps clarify: Used to rule in or rule out Hypoperfusion.
Peer-reviewed references