USMLE Forums banner

Pulse Pressure and Vessel Compliance

9176 Views 8 Replies 4 Participants Last post by  drcuddles
In my understanding, if vessel compliance is increased, diastolic BP should decrease.
but in Kaplan notes, both 2008 and 10 version, they say, in case of pulse pressure, decreased vessel compliance = decreased diastolic BP.

kinda confused here. what am I missing?

plus, if anyone of you have Kaplan 2008 errata....please help me here with that.

thank you.
  • Like
Reactions: 1
1 - 4 of 9 Posts
First of all, thanks for your time.

I don't have any problem understanding that. I mentioned that in my post. I am just confused when they are mentioning pulse pressure ,they are saying the exact opposite of what you/I said and that is in both editions. Hence, my confusion.

but according to your explanation, if I consider pulse pressure,
pressure change (systole has to increase and diastole has to decrease) increased and volume change is constant, only then i can think that decreased vessel compliance comes with decreased diastolic.

Please give a response on it.

btw,u made a good explanation.
I think this is where you're backwards.

What doctorsmonters wrote is correct: a fixed stroke volume going into a vessel with decreased compliance results in a greater pulse pressure - that is to say, a greater gap between systolic and diastolic pressures. Systolic pressure goes up with decreased compliance and diastolic goes down.

hope that helps?
yeah,that is exactly what I said in my 2nd post.thanks for your input.:)
OK I am not sure I understood your question but if I did, you got it right.

Pulse pressure= systolic pressure-diastolic pressure

So decreased compliance will lead to high systolic and low diastolic, means large difference and large pulse pressure.:)
thanks a lot.I am glad that it is now clear to me.thank you sooo much.:happy:
  • Like
Reactions: 1
1 - 4 of 9 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.