Peripheral Arterial Pressure

To determine arterial blood pressure subdivided in to 'pysical' and 
'physiologic' factors.  It is determined directly by two major physical
factors, the arterial blood volume and the arterial compliance.  There 
physical factors are affected in tun by certain physiologic factors, primarily 
the heart rate, stroke volume, cardiac output(heart rate* stroke volume)

Mean arterial pressure is the pressure in the arteries, averaged overtime.  
Pa(mean arterial pressure) = Pd(diastolic pressure) +1/3(Ps(systolic)-Pd)

The radial stretch of the ascending aorta brough about by left ventricular ejection
initiate apressure wave that is propagated down the aorta and its braches.  
The pressure wave travels much faster than actual blood flow. This pressure wave 
provide valuable information.  Genarally, this pressure wave is getting increased
with age.  That comfirms the arteries become less complian with advancing age.

When systolic pressure is 120 mmHg and diastolic pressure is 80 mmHg
what is mean arterial pressure?

Answers:

To plug into the equation,

Pa=Pd+1/3(Ps-Pd)=93.3 mmHg

For more information on this topic, please refer to Berne & Levy , Pages 140~149

Also, check out the following links that may be helpful:

• "Peripheral Arterial Evaluation"
• "Peripheral Arterial Diseases"
• And, as always, if you have questions, or if you can suggest a helpful link, please e-mail me.

No!
Please don't make me go to any of those pages!
I want to go somewhere completely different!

This page was written by Sang Ho Ma #612-58-5771 shma@scf.usc.edu , a student in this course.

BME 403 Pages maintained by the T.A., Douglas Miles.