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A member asked:
If you have 140 bp in arm and a 1,4 cm aorta, the pressure must be higher on your aortic walls then if you had 2cm aorta and 140 systolic in arm?
2 doctors weighed in across 2 answers
No.: The pressure is what it is. Assuming the aorta is smooth, pressure is transmitted down the length. Size of the tube does not matter. However, aorta is elastic and stretches to accommodate the bolus of blood thereby dampening the pressure. If there were a sudden constriction in the aorta the pressure would drop at that constriction or conversely increase if there were an aneurysm or dilation.
Answered 5/26/2015
2.8k views
Pressure is the same: But the wall tension isnt. The larger the blood vessel the greater the wall tension. This is Laplace ' s Law. Just think of a partially inf l ate balloon. The pressure is the se throughout the balloon but the wall tension is greatest in the inflated areas.
Answered 5/26/2015
2.8k views
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