[brandonb]

This sounds like reflex tachycardia -- your body wants to ensure blood is flowing to all the right places, so it raises heart rate to partially compensate for blood pressure falling. Reflex tachycardia can be a normal response to certain types of blood pressure medications, like vasodilators or diuretics. Beta blockers are a different common type of blood pressure medication that attempt to lower both blood pressure and heart rate simultaneously.

If the increase in heart rate is large (>30bpm), especially when going from laying to standing, it could be a sign of underlying dysautonomia or POTS. If you experience symptoms (dizziness, fatigue, fainting, etc) it's worth getting evaluated. We (the OP) do offer medical care for POTS here: https://empirical.health/pots

As for the relationship between low heart rate and longer life spans, it's not necessarily causal -- a lower heart rate is often a sign of a stronger cardiac muscle (each beat pumps more blood, so fewer beats per minute are required to pump the same volume of blood). So I'd suspect much of the relationship here is driven by these confounding variables!

[AnonC]

I won’t be a user of your service, but wanted to share a bit of feedback on the page you shared. On that page, I didn’t see any definition for POTS (though I know what it is or if I were someone else, I could’ve searched online). The page mentions a CHOP protocol without a link or explanation about what it is. I think the page could do better with some simple explanations or at least a guidance on symptoms and what you offer. Currently it seems like it’s optimized to be linked for anyone searching for POTS, which probably assume a lot more than what most people may be aware of.

[brandonb]

You're absolutely right. This page was originally written for people searching for POTS, so we assumed some context. I've updated the page to link to pages we've written on POTS diagnosis and the CHOP protocol, so that it stands alone a bit more.

[mysterypie]

Let me second your comment. That webpage really needs to define POTS and give a brief explanation. It's written as if everyone knows what it is. I've never encountered the term Postural Orthostatic Tachycardia Syndrome until now.

[brandonb]

Thanks! Mentioned above -- I updated the page to link to dedicated articles on each of these.