ECG Workshop Flashcards

1
Q

how many electrodes form a 12 lead ECG?

A

10

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2
Q

how many electrodes go on the chest?

A

6

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3
Q

where are V1 and 2 located on ECG?

A

4th intercostal space at each sternal border

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4
Q

what limbs are used for ecg?

A

RA
LA
RL

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5
Q

what is V3 used for in ECG?

A

V2-4

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6
Q

where is V4 placed in ECG?

A

5th intercostal space midclavicular line

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7
Q

leads are placed on the inner/outer aspect of the limb

A

inner

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8
Q

lead 1 measures

A

RA-LA

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9
Q

recording electrode for lead 1 is…

A

LA

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10
Q

lead 2 is..

A

right arm to left leg

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11
Q

recording electrode for lead 2 is…

A

left leg

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12
Q

lead 3 is..

A

LA to LL

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13
Q

recording electrode for lead 3 is…

A

LL

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14
Q

name the 6 chest leads

A

1, 2, 3

avL, avF, avR

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15
Q

name the anterior ECG leads

A

V3-4

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16
Q

name the septal ECG leads

17
Q

name the lateral ECG leads

A

1, avL, V5, V6

18
Q

calibration of an ECG?

19
Q

how many large boxes are there per second on an ECG?

20
Q

a large box equates to how many seconds?

21
Q

what is the normal electrical axis of the heart

A

+90 to -30

22
Q

the axis is normal if what axes are upright?

23
Q

what will leads 1 and avF look like in left axis deviation?

A

1 positive

avF negative

24
Q

what will leads 1 and avF look like in right axis deviation

A

1 negative

avF positive

25
how can you work out if an ECG is irregular in rhythm?
if there is uneven space between each QRS complex
26
how to work out an irregular heart rate on ECG
no. of QRS complexes in 30 boxes x 10
27
how to work out normal HR on ECG
no. of large boxes between 2 QRS complexes, divide this by 300
28
how to work out normal HR on ECG
300 / no. of large boxes between 2 QRS complexes
29
QRS should be shorter than...
<0.1secs | <2-3 small squares
30
how to introduce an ECG?
ECG of (patient name, DOB) taken at (date, time), calibration
31
how should you describe an ECG?
``` is electrical activity present? rhythm irregular or regualar rate p waves present? each p wave followed by QRS changes to QRS/ST wave? ```
32
how should you describe an ECG?
``` is electrical activity present? rhythm irregular or regular rate p waves present? each p wave followed by QRS changes to QRS/ST wave? ```
33
describe mobitz 1
progressive prolongation of the PR interval until you get a dropped beat
34
describe mobitz 2
normal PR interval length but some arent followed by a QRS complex
35
Tx mobitz 1
mostly conservative
36
Tx mobitz 2
pacemaker
37
why can you get chest pain in tachycardia?
myocardium is perfused during diastole
38
adenosine works on the __ node
AV
39
ST depression is a sign of...
myocardial ischaemia