Originally Posted by Dr266
I don't understand how diastole decreases in a non compliant vessel. i.e. aorta . i.e. decreased compliance causes dec in pressure yet in lungs the decrease in compliance results in palm HTN. can someone pl explain this concept to me. thank you
I'll take a stab at it. compliance is defined as a change in volume over change in pressure.
When you talk about diastole, you mean the pressure in the aorta during distole? If you have decreased compliance you have increased elastance, thus with the lungs if you have decreased compliance, the vessesls expand less when the likewise amount of pressure is applied, thus being less compliant you will have a higher pressure, this the pulmonary HTN.
Since the aotra is non compliant, or high elastance, the qualities are inverse, the pressure will no change much, if it all bc the aorta has high elastance, thus the pressure is less in the aorta not bc the lack of compliance, well if it was highly compliant it would be less, but more so bc the heart is relaxing and the high elastance prevents a presure change,
feel free anyone to correct me