ECG Workshop

Question 1

How is a regular HR calculated on ECG?

Answer 1

Number of big squares between R-R interval and divide by 300

Question 2

How is an irregular rhythm calculated on ECG?

Answer 2

Number of QRS complexes in 30 big squares x10

Question 3

What I the normal cardiac axis?

Answer 3

-30 to + 90

Question 4

Absence of P waves and irregular rhythm suggests what?

Answer 4

AF

Question 5

What is the normal PR interval?

Answer 5

0.12-0.2s (3 to 5 small sq)

Question 6

Prolonged PR interval suggests what?

Answer 6

Heart block

Question 7

Prolonged PR and regular rhythm suggests what?

Answer 7

First degree heart block

Question 8

PR interval increasing and a dropped ORS complex suggests what?

Answer 8

Mobitz type I Second degree heart block

Question 9

PR interval fixed and dropped ORS complexes suggests what?

Answer 9

Mobitz type II Second degree heart block

Question 10

P waves and QRS complexes being completely unrelated suggests what?

Answer 10

Third degree heart block

Question 11

Where does first degree heart block occur in the heart?

Answer 11

Between the SA node and the AV node

Question 12

Where does Mobitz type I heart block occur?

Answer 12

In the AV node

Question 13

Positive lead II and aVF suggests what about the cardiac axis?

Answer 13

Normal

Question 14

Where does Mobitz type II occur in the heart?

Answer 14

Bundle of His or Purkinje fibres

Question 15

Shortened PR interval may suggest what?

Answer 15

Accessory pathways

Question 16

What is the normal width of the QRS complex?

Answer 16

<0.12s

Question 17

Bundle branch block may cause what on ECG?

Answer 17

Broad QRS

Question 18

What height constitutes a small QRS complex?

Answer 18

<5mm in limb <10mm in chest

Question 19

Tall QRS complexes suggest what?

Answer 19

LVH

Question 20

Delta waves are found in which condition?

Answer 20

Wolff-Parkinson-White syndrome

Question 21

Where are delta waves found on the ECG?

Answer 21

QRS complex

Question 22

ST elevation is most commonly seen in which condition?

Answer 22

MI

Question 23

Tall T waves may indicate what?

Answer 23

Hyerpacute STEMI Hyperkalaemia

Question 24

Biphasic T waves are indicative of what?

Answer 24

Ischaemia Hypokalaemia

Question 25

Flattened T waves are indicative of what?

Answer 25

Ischaemia Electrolyte imbalance

Question 26

RBBB shows what on ECG?

Answer 26

QRS has M pattern on V1 W pattern on V6 (MarroW)

Question 27

LBBB shows what on ECG?

Answer 27

QRS has W pattern on V1 and M pattern on V6 (WilliaM)

Question 28

An ECG with no P waves or QRS complexes is indicative of what?

Answer 28

VF

Question 29

RBBB with ST elevation in leads V1-V3 indicate what?

Answer 29

WPW

Question 30

PR depression and saddle-shaped ST interval is indicative of what?

Answer 30

Pericarditis

Question 31

Lead I positive, aVF negative is indicative of what?

Answer 31

Left axis deviation

Question 32

Lead I negative, aVF positive indicates what?

Answer 32

Right axis deviation

Question 33

Where is V1 electrode placed?

Answer 33

4th intercostal space, just right of the sternum

Question 34

Where is V2 electrode placed?

Answer 34

4th intercostal space, just left of the sternum

Question 35

Where is the V3 electrode placed?

Answer 35

Midway between V2 and V4

Question 36

Where is the V4 electrode placed?

Answer 36

5th intercotsal space, mid-clavicular line

Question 37

Where is the V5 electrode placed?

Answer 37

5th intercostal space, anterior axillary line

Question 38

Where is the V6 electrode placed?

Answer 38

5th intercostal space, midaxillary line

Question 39

What does Lead I measure?

Answer 39

Right arm to left arm

Question 40

Where does Lead II measure?

Answer 40

Right arm to left leg

Question 41

Where does Lead II measure?

Answer 41

Left arm to left leg

Question 42

Which leads look at the inferior part of the heart?

Answer 42

II, III, aVF

Question 43

Which leads look at the lateral side of the heart?

Answer 43

Lead I, aVL, V5, V6