If a person has a palpable pulse then what is their minimum blood pressure and why?
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If his or her systolic blood pressure[?] is below 90, the radial pulse will not be palpable. If his or her systolic blood pressure is below eighty, the brachial pulse will not be palpable. If his or her systolic blood pressure is below sixty, the carotid pulse will not be palpable. Since systolic blood pressure rarely drops that low, the lack of a carotid pulse indicates death. It is not unheard of, however, for patients with certain injuries, illnesses or other medical problems to be conscious and aware with no palpable pulse.
These are not hard and fast rules; it varies from person to person.
The reason that you can't feel a pulse when the blood pressure is low, is that there is diminished cardiac output. The heart isn't putting out enough blood to get it through the entire body with enough force to create a pulse.
Hope this helps!
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