Hey,
Upon standing up more blood accumulates in lower body --> hypotension due to decreased preload --> increased sympathetic firing and decreased parasympathetic stimulation --> increased HR, vasoconstriction and DIASTOLIC blood pressure.
But apparently, the systolic blood pressure decreases. Why is that?
Upon standing up more blood accumulates in lower body --> hypotension due to decreased preload --> increased sympathetic firing and decreased parasympathetic stimulation --> increased HR, vasoconstriction and DIASTOLIC blood pressure.
But apparently, the systolic blood pressure decreases. Why is that?