Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/39

Click to flip

39 Cards in this Set

  • Front
  • Back
ascending limb
Aortic Pressure Wave

aortic wall distension occurs during the rapid ejection phase of the cardiac cycle represented on the graph as the ________.
Maximum aortic ______= maximum extent of aortic wall distension.
pressure
________ marks the end of ventricular systole (aortic valve closure).
Dicrotic notch
________ refers to when the blood is forced through peripheral vessels as aortic walls recoil.
Diastolic runoff
Pressure progressively declines to the arterial ______ value, just prior to the next ejection.
diastolic
Arterial pressure is normally substantially ______ than ventricular pressure during ventricular diastole.
greater
Pulse pressure =
systolic pressure - diastolic pressure
Mean arterial pressure (Pa or MAP)=~
estimated as diastolic pressure plus 1/3 of the pulse pressure.
Compliance is a measure of the _______ of the vessel wall
"expandability”
slope

dV/dt
Arterial compliance (Ca) is the ____ of the pressure-volume curve at any point.

in other words
Ca=
Ca is not constant, but changes at very ___ or ___ pressure levels.
low
high
Ca decreases progressively with ____ , especially at the higher pressures
age
Compliance is the reciprocal of _______. C.
wall stiffness
To compare vessels of different sizes or types, _________ is often used, rather than compliance
DISTENSIBILITY
distensibility =
% change in volume/ change in pressure
decreases
Increasing age progressively ________ the slopes of arterial pressure-volume curves
MAP depends directly upon the mean ____ of blood in the arterial system (Va), which determines how greatly the arterial walls are distended.
volume
Ca does NOT determine the final magnitude of changes in either ___ or ___ following changes in CO or TPR. (This may sound strange at first, but has been verified. And note that the statement applies to mean arterial volume and pressure, not the diastolic or systolic values.)
Va
MAP
MAP =
CO•TPR
Mean arterial pressure (MAP) is directly proportional to mean arterial blood _____.
volume
Ca does NOT determine the final magnitude of changes in either ___ or ___ following changes in CO or TPR. (This may sound strange at first, but has been verified. And note that the statement applies to mean arterial volume and pressure, not the diastolic or systolic values.)
Va
MAP
rate of change
Ca influences only the _______ of Va and MAP following changes in CO (see figure below) or TPR.
the rate of change of MAP is _______ related to the magnitude of Ca.
inversely
Assuming arterial compliance (Ca) is constant, pulse pressure is _______ proportional to SV.
directly
Pulse pressure (systolic P-diastolic P) is _________to stroke volume
perportional
A consequence of hemorrhage is a decrease in SV. What is the expected effect of hemorrhage per se on pulse pressure (assuming no change in Ca or TPR
Decreases SV= decreased pulse P
Ca is the ___ of the pressure-volume curve
slope
Assuming SV is constant, pulse pressure is ______ related to Ca
inversely
One of the consequences of arteriosclerosis is a decrease in Ca. Assuming that no other factor changes, what would be the expected effect of arteriosclerosis on pulse pressure?
-increase
If all other factors remain constant, changes in TPR will cause systolic and diastolic pressures and MAP to change in the same direction, BUT _______ will not be changed (Fig. 6-14, left). I.e., TPR doesn’t directly determine ________
pulse pressure
pulse pressure.
However, increases in TPR may result in a decrease in ____.
Ca
However, increases in TPR may result in a decrease in Ca. How will the latter affect pulse pressure
Inversely perportional, increase pulse pressure
c. In addition, an increase in TPR may result in a decrease in SV. How will the latter affect pulse pressure?
Perportional, decrease pulse presure
Therefore, changes in TPR may affect pulse pressure _______ because of changes in Ca or SV.
indirectly
Normally, pulse contours are progressively ______ as pressure changes are transmitted to peripheral arteries
distorted
When Ca is decreased (e.g. by arteriosclerosis), there is _____ peripheral distortion of the pulse contour
less
Pressure waves move _____ than the blood actually flows a given distance from the heart
faster
Pressure wave velocity is ______ related to Ca
inversely
How will progressive arteriosclerosis be expected to affect the velocity of pressure wave transmission?
Lower compliance—faster velocity