Why does blood pressure decrease when you stand up from a lying down position?

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SUMMARY

The discussion centers on the phenomenon of postural hypotension, which occurs when blood pressure decreases upon standing from a lying position. This condition is characterized by a drop in systolic blood pressure, leading to symptoms such as dizziness. The participants emphasize the importance of consulting a doctor if experiencing these symptoms, particularly during blood pressure measurements taken in different positions: lying down, sitting, and standing.

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  • Knowledge of blood pressure measurement techniques
  • Familiarity with the cardiovascular system
  • Basic concepts of venous pooling and gravity's effects on circulation
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Medical students, healthcare professionals, individuals experiencing dizziness upon standing, and anyone interested in understanding blood pressure dynamics.

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I know there is venous pooling due to gravity but how does this exactly affect pressure exerted on the walls of blood vessels. Does systolic or diastolic blood pressure decrease? Thanks!
 
Last edited:
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uhhhh normally your blood pressure would stay the same, or maybe increase just a smigden.
but if your blood pressure does decrease. its called postural hypotension. and you might be dizzy sometimes when you stand up and you should probably consult your doctor about it.
p.s. normally if you were having your blood pressure taken you'd have it in a lying down position then sitting up and then standing up.
 

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