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Old 05-04-2013
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Sphygmomanometer Different Blood Pressure in Extremities

blood pressure changes in upper extremities....

1) aortic dissection--(right arm low BP than left)

2) subclavian steal syndrome ---( left arm low BP than right)

3) accelerated atherosclerosis (same as aortic dissection)


are there any more......? if +nt pls share with me..

4) coarctation of aorta---->low BP/pulse? in lower extremities

5) PDA---->low pulse in lower extremities


thanks...
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Old 05-04-2013
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can you please explain why left arm bp lower than right in subclavain steal syndrome...just curious
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Old 05-04-2013
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because lt. sided subclavian artery is direct branch of aorta (more prone)----so obstruction lead to lowering BP more on left than right.

and rt. sided subclavian artery is branch of brachiocephalic artery (not aorta itself)

Last edited by venky2600; 05-04-2013 at 12:22 PM.
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and also adding

6) Takayasu arteritis ----->no pulse in upper extremities (pulseless disease)
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Old 05-04-2013
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Normally, BP in lower extremities is higher (10-15mmHg) than upper because of gravity. In COA (adult type), you have lower systolic BP (<15%) in lower extremities and high systolic BP in upper extremities. Pulses are weak or absent in the legs compared to arm. In the arms and carotids you get bounding pulses.
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