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Flashcards in Cardio - Echo Deck (71)
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1

What are some advantages to using echo?

Useful for assessing cardiac structure AND function, provides definitive diagnosis of most cardiac diseases, noninvasive

2

What are disadvantages of echo?

Requires expensive equiment and technical expertise

3

How does echo work?

High frequency sound waves are emitted from a transducer and are reflected/refracted/absorbed by tissues

4

What determines the proportion of reflected waves (returing to transducer)?

Acoustic impedance

5

What has the greatest to least acoustic impedance?

Fluid > soft tissue > fibrous tissue > solids (bone)

6

What are the 4 echo modalities?

2D, M-mode, color doppler, spectral doppler

7

What is M-mode?

Still image of single 1D slice throughout multiple cardiac cycle

8

What is color doppler?

Codes blood flow with color indicating direction

9

What is spectral doppler?

Measures velocity of blood flow

10

What are the 3 sites on which the transducer can be placed?

R parasternal, L apical, Subcostal

11

What orientations can you hold the transducer at?

Long-axis, short-axis

12

A

RV free wall

13

B

RV

14

C

tricuspid valve

15

D

RA

16

E

interventricular septum

17

F

LV

18

G

LV free wall

19

H

mitral valve

20

I

LA

21

The LV should be ____ the size and thickness of the RV in long-axis.

3-4x

22

LA and LV should be roughly the same maximum _____.

height

23

_____ and _____ should be roughly the same diameter.

LA and Ao

24

What does it mean if the doppler is showing "party colors"?

There is turbulent, high-velocity flow in that area

25

What does blue on the doppler mean?

away

26

What does red on the doppler mean?

towards

27

A

RV

28

B

Interventricular septum

29

C

LV

30

D

LV papillary muscles

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