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