Does blood pressure affect heart rate?

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Does blood pressure affect heart rate?
« on: 08/03/2010 21:30:02 »
Chris asked the Naked Scientists:
I've been wondering if blood pressure has an effect on heart rate (or vice versa) ?

If it does; what effect would this relationship have on fainting (especially so called Dizzy Spells) ?

What do you think?
« Last Edit: 08/03/2010 21:30:02 by _system »


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Does blood pressure affect heart rate?
« Reply #1 on: 09/03/2010 05:12:11 »
In an hydraulic system, the "speed" of the pump could certainly affect the pressure in the hydraulic connections, but that pressure could quite easily be limited by other pressure limiting devices, even if the pump was running very fast.

As I've no idea how the heart works and if there is some other pressure regulating mechanism, I'm not qualified to say any more. Mrs G is a nurse, and she seems to have no difficulty understanding blood pressure numbers and such, but it's always been a complete mystery to me.
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