CVPR Week 3: Pressure Volume Loops Flashcards by Jay Sandoval | Brainscape

Q

Objectives

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What is a pressure volume loop?

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

The value of pressure-volume loops

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Question 1

A

A.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Question 2

A

C.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Question 3

A

B.

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Question 4

A

B

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What is this?

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

How to create a pressure-volume loop?

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What happens between 1 and 2?

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What happens between 2 and 3?

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What happens between 3 and 4?

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What happens between 4 and 1?

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What is stroke volume =

A

end diastolic volume - end systolic volume = SV

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What is the stroke volume?

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What is the ejection fraction?

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What does the whole shaded area represent?

A

ventricular stroke work

Work = Force x Distance

Work = Pressure x Volume

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Describe Starling’s Law of the heart

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

What is preload?

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

Preload equation

A

P(r)/2w

r = radius of sphere

w = wall thickness

preload directly proportional to pressure

Preload directly proportional to volume

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

End-diastolic pressure volume relationship

A

How well did you know this?

1

Not at all

2

3

4

5

Perfectly

Q

End-diastolic pressure volume relationship on a pressure volume loop

A

Q

What is afterload?

A

Q

Afterload equation

A

P(r)/2w

Q

Afterload is directly proportional to?

A

Pressure

or

to simplify further

Afterload is proportional to systemic systolic blood pressure

Q

Preload proportionality

A

preload is directly proportional to volume
preload is directly proportional to pressure

Q

What point on a pressure-volume loop represents maximal ventricular contraction

A

point 3

Q

Identify

A

Q

End-systolic pressure volume relationship

A

Q

ESPVR and Contractility

A

Q

Review of preload, afterload and contractility?

A

Q

ESPVR AKA

A

End-systolic pressure volume relationship

Q

EDPVR AKA

A

End-diastolic pressure-volume relationship

Q

Changing parameters: Increase preload

A

Q

Changing parameters: Decrease preload

A

Q

Changing parameters: Increase afterload

A

Q

Changing parameters: Decrease afterload

A

Q

Changing parameters: Increase contractility

A

Q

Changing parameters: Decrease contractility

A

Q

Pressure-volume loop: Systolic heart failure

A

systolic heart failure

Q

Pressure-volume loop: Diastolic heart failure

A

Q

Inotropy definition and examples

A

An inotrope is an agent that alters the force or energy of muscular contractions.
Negatively inotropic agents weaken the force of muscular contractions.
Positively inotropic agents increase the strength of muscular contraction.

Q

Post spinal hypotension treatment

A

Q

An increase in contractility does what to the ESPVR?

A

steepens it

Q

An decrease in contractility does what to the ESPVR?

A

flattens it or decreases it

Q

What is afterload represented by?

A

Afterload is represented by the pressure seen between 2 and 3

Q

How is contractility represented?

A

by the steepness of the ESPVR

Q

What is preload represented by?

A

how far out (to the right) on the EDPVR we go

Q

What is the line of contractility referring to?

A

Q

The slope of the ESPVR represent?

A

The slope of this line represents

(ΔP/ΔV) = End-systolic elastance

Q

What is End-systolic elastance?

A

End-systolic elastance = (ΔP/ΔV)

it is represented by the slope of the ESPVR

Q

Label the Diastolic pressure, systolic pressure, end-diastolic volume, end-systolic volume and stroke volume on a pressure-volume loop (define ejection fraction)

A

Q

Elastance equation

A

ΔP / ΔV