What is the poor man's endothelial function test?


Senior Member
We all know the poor man's tilt table test, but is there an equivalent for endothelial function?

The most usual way to measure endothelial function is via the Flow Mediated Dilation (FMD) test. It is not a high-tech test, but it tends not to be easily available either (not sure why).

I am looking for something that would help me keep track of treatment on a continuous basis.

The closest I heard is the capillary refill test, which is very simple, but it is not the same thing though.


Hi @marcjf I think your question is an intriguing one. I do not know of any "quick access" tests for regular monitoring, especially if you are looking to monitor changing functional parameters rather than the structural changes in arteries that occur in later-stage endothelial dysfunction.

@Pyrrhus started a great informational thread on Endothelial Dysfunction in ME/CFS, if you haven't seen it: https://forums.phoenixrising.me/threads/endothelial-dysfunction-in-me.83521/

Here is an article on the different ways to measure endothelial function, some of the blood markers could potentially be useful if tracked over time: