A member asked:

Why does pulse rate increase with decreased blood pressure to point of fainting?

A doctor has provided 1 answer

Reflex: If your pressure is inadequate to sustain organ perfusion, the bodies alarm system (sympathetic nervous system; fight or flight) send out the message to speed up the heart rate and constrict the blood vessels.

Answered 7/11/2012

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Related Questions

A member asked:

Does high blood pressure increase or decrease your pulse rate?

A doctor has provided 1 answer