Why is the blood pressure measured when sitting down so much higher than lying down?

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Hello doctor! Why is the blood pressure measured when sitting down so much higher than lying down (more than 10 mmHg difference for diastolic blood pressure)?
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Hello! It is very normal for blood pressure to vary with position, several studies that have compared blood pressure values ​​when measured in the sitting or supine position have shown blood pressure to range from 0 to a maximum of 10 mmHg. . In most studies, mean systolic blood pressure was higher when measured in the supine position than in the sitting position, while mean diastolic blood pressure was usually highest in the sitting position. However, in order to have an accurate blood pressure reading, you need to check: Choose the right meter, bandage, place your hand at heart level... You should go to the heart center for more tests.
You can go to a hospital of Vinmec Health System nationwide for a doctor to advise you better. Thank you for trusting and sending the question "Why is the blood pressure measured while sitting down so much higher than lying down?" to Vinmec. Best regards!

Answered by Master, Doctor Vu Thi Tuyet Mai - Cardiovascular Center - Vinmec Central Park International General Hospital