2 doctors weighed in:

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

2 doctors weighed in
Dr. Andrew Turrisi
Radiation Oncology
1 doctor agrees

In brief: 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.

In brief: 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.
Dr. Andrew Turrisi
Dr. Andrew Turrisi
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