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Flashcards in ECGs Deck (28)
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1

lead colour and where does it get stuck to: V1

red
4th IC space R sternal edge

2

lead colour and where does it get stuck to: V2

yellow
4th IC space L sternal edge

3

lead colour and where does it get stuck to: V3

green
midway between V2 and V4

4

lead colour and where does it get stuck to: V4

brown
5th IC space midclavicular line

5

lead colour and where does it get stuck to: V5

black
left anterior axillary line, same level V4

6

lead colour and where does it get stuck to: V6

mauve
left mid axillary line, same level V4 and V5

7

red limb lead

right ulnar styloid process

8

yellow limb lead

left ulnar styloid process

9

green limb lead

left medial malleolus

10

black limb lead

right medial malleolus

11

what do 5 large squares =

one second

12

what does 1 large large square =

0.2s

13

what does 1 little square =

0.04s

14

what does P wave correspond to

atrial depolarisation

15

what does QRS complex correspond to

ventricular depolarisation

16

what does T wave correspond to

ventricular repolarisation

17

PR interval

time from atrial depolarisation to ventricular depolarisation
should be 0.12-0.2s (3-5 little squares)

18

QRS complex

time for whole of ventricle to depolarise
should be <0.12s (< 3 little squares)

19

QT interval

time spent in ventricular depolarisation and repolarisation
should be max 0.42s

20

ARI BAR

any electrical activity?
rate
irregular or regular
broad or narrow QRS complexes
atrial activity
relationship between P waves and QRS complexes

21

calculating ventricular rate

count number of QRS complexes in 30 big squares.
times the number by 10

22

determining whether or not QRS complexes are irregular or regular

mark 3 on bit paper and slide paper along to check the next 3 line up

23

is QRS complex broad or narrow

3 or less little squares
if so then means impulse was initiated and atrioventricular node = normal

24

broad QRS complexes

>3 little squares (>0.12s)
impulse has arisen from ventricles - not depolarised normally

25

checking for atrial activity and relationship between P waves and QRS complexes

are there P waves?
is there a P wave before each QRS and a QRS after each P wave
PR interval - should be 3-5 little squares

26

1st degree heart block

prolonged PR interval (>5 small squares)

27

2nd degree heart block

there is a relationship between P and QRS but is variable

28

3rd degree heart block

no relationship between P and QRS