ECG Made Easy Cards

Question 1

Each small square is how long?

Answer 1

0.04s

Question 2

each big square is how long?

Answer 2

0.2 s

Question 3

how to calculate rate?

Answer 3

number of Rs x 6

Question 4

how long is the QRS complex normally?

Answer 4

120ms

Question 5

how long is the PR interval normally?

Answer 5

180ms

Question 6

which 2 leads look at heart from opposite directions?

Answer 6

Lead aVR

Lead II

Question 7

what happens to lead III in left ventricular hypertrophy?

Answer 7

more negative

Question 8

V3 and V4 look at what?

Answer 8

septum

Question 9

V3 and V4 look at what?

Answer 9

septum

Question 10

how do you know you’re looking at septum?

Answer 10

R and S waves are equal

Question 11

how do you know you’re looking at septum? called?

Answer 11

R and S waves are equal

Transition point

Question 12

why is the transition point important?

Answer 12

if a ventricle is enlarged, transition point will move
Left: V2, V3
Right: V4, V5

Question 13

why is the transition point important?

Answer 13

if a ventricle is enlarged, transition point will move
Left: V2, V3
Right: V4, V5

Question 14

calibration is set to how many cm?

Answer 14

1mV causes 1cm deflection

Question 15

what can mask ECG in a parkinson’s patient?

Answer 15

tremor or muscular contractions

Question 16

order of ECG reporting:

Answer 16

1. rhythm
2. conduction intervals
3. cardiac axis
4. QRS description
5. ST segments and T waves

Question 17

PR interval should less than?

Answer 17

6 small squares

Question 18

PR interval should less than?

Answer 18

6 small squares

Question 19

what does first degree heart block look like on ECG?

Answer 19

prolonged PR internal (>220ms)

Question 20

AF need to be at a certain rate?

Answer 20

Any rate AF

Question 21

what slows AV node?

Answer 21

Betablocker
Verapamil
diltiazem
Sotalol

Question 22

most common cause of no ‘p’ waves?

Answer 22

AF

Question 23

wide QRS could mean?

Answer 23

-not going through His-Purkinje system

Question 24

-different origins of depolarization

Answer 24

• Ventricular origin (Ectopic or escape beat)

- Bundle branch block (cell-cell conduction is slower)

Question 25

wide QRS common causes?

Answer 25

AF/bundle branch block (cell-cell) (irregular rhythm)

Pacemaker in right ventricle (cell-cell) (regular rhythm)

Question 26

disassociated ‘p’ waves could mean?

Answer 26

junctional escape beat

isorhythmic dissociation

Question 27

What is the difference between Mobitz type 1 and Type 2?

Answer 27

Both are second degree heart blocks
Type 1: progressive lengthening of PR interval
Type 2: PR interval is constant with a solo P wave

Question 28

what is second degree heart block?

Answer 28

excitation completely fails to pass through AV node/bundle of His

Question 29

what is 2:1 conduction?

Answer 29

2 P waves per QRS or a second P wave within the ‘T’ wave

Question 30

what is 3rd degree heart block?

Answer 30

normal atrial contraction, nothing to the ventricles

Question 31

How are ventricles depolarized in 3rd degree heart block? look like what on ECG?

Answer 31

slower ‘escape mechanism’, widened ‘QRS’ interval

Question 32

cause of chronic 3rd degree heart bloack?

Answer 32

fibrosis around bundle of His

bilateral bundle branch blocks

Question 33

what is 3rd degree heart block?

Answer 33

normal atrial contraction, nothing to the ventricles

Atrial rate completely different from QRS rate