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Flashcards in Systolic Function Deck (29):
1

formula for LV fractional shortening

(LVIDd-LVIDs)/LVIDd x 100%

2

formula for cross sectional area

πr^2 = 0.785 x d^2

3

formula for stroke volume via 2D

EDV-ESV, [mL]

4

formula for single plane ejection fraction

(LVIDd^3-LVIDs^3)/LVIDd^3 x 100% =
(EDV-ESV)/EDV x 100% =
SV/EDV x 100%

5

formula for biplane ejection fraction

(∑LVIDd^3-∑LVIDs^3)/∑LVIDd^3 x 100% =
(∑EDV-∑ESV)/∑EDV x 100%

6

What assumption is being made by equating LVIDd^3=EDV?

the ventricle shape is a prolate ellipse

7

formula for cardiac output

SV(L) x HR, [L/min]

8

formula for stroke volume via Doppler

CSA x VTI, [mL]

9

formula for fractional area change

(EDA-ESA)/EDA x 100%
same as EF, just with areas

10

What does TAPSE stand for?

Tricuspid Annular Plane Systolic Excursion

11

What does TAPSE measure?

DISPLACEMENT of lateral TV annulus

12

What does TDI stand for?

Tissue Doppler Imaging

13

What does TVI stand for?

Tissue Velocity Imaging

14

Tissue Velocity Imaging, aka

Tissue Doppler Imaging

15

Tissue Doppler Imaging, aka

Tissue Velocity Imaging

16

Where do you place the TDI sample volume for the TV?

1 cm inferior/apical of TV lateral annulus

17

What does TDI of the TV measure?

VELOCITY of tissue displacement at the lateral annulus

18

What part of the TDI wave is measured to assess systolic function?

s' wave

19

What does Dp/Dt measure?

global systolic performance via the rate of rise of systolic pressure on the mitral regurg.

20

How do you do Dp/Dt?

CW with colour of MR in A4CH, increase sweep speed to 150-250 cm/s, optimize signal, measure the time it takes for the regurgitant flow to go from 1 m/s to 3 m/s on the acceleration slope

21

formula for Dp/Dt

ΔP/Δt x 1000 = 4v^2/Δt x 1000, [mmHg]

22

formula for pressure gradient

P1-P2 = 4v^2

23

What does Speckle Tracking measure?

measures strain in each wall segment by tracking two 2D speckles within each segment

24

What does Deformation Imaging measure?

measures strain in each wall segment by tracking two 2D speckles within each segment

25

Deformation Imaging, aka

Speckle Tracking

26

Speckle Tracking, aka

Deformation Imaging

27

What is Global Strain?

average strain of all wall segments

28

How do you evaluate a heart using the Wall Motion Index?

each wall segment gets a score based on the type of motion observed, scores are averaged (summed and divided by # of segments), and the average motion score is correlated to an appropriate EF

29

wall motion scoring system

1. Normal/Hyperkinetic
2. Hypokinetic
3. Akinetic
4. Dyskinetic
5. Aneurysmal