ECG CORE

Question 1

What does the P wave represent

Answer 1

Atrial depolarisation

Question 2

What does the PR interval represent

Answer 2

AVN Conduction delay

Question 3

What does the QRS represent

Answer 3

Ventricular depolarisation

Atrial Repolarisation

Question 4

What does the ST segment represent

Answer 4

Ventricular relaxation

Question 5

What does the T wave represent

Answer 5

Ventricular repolarisation

Question 6

How long should a P wave last

Answer 6

0.12 - 0.2 s

Question 7

How long should the QRS last

Answer 7

0.08 - 0.1s

Question 8

When can an ECG diagnose a disease (MAD PE)

Answer 8

MI
Arrythmia
Drug toxicity
Pericarditis
Electrolyte imbalance

Question 9

What leads are used to diagnose RCA MI

Inferior

Answer 9

aVF 2 and 3

Question 10

What leads are used to diagnose LAD

Anterior and septal

Answer 10

V1 - V2

Question 11

What leads are used to diagnose L Circumflex (Lateral)

Answer 11

aVL
1
V5 AND V6

Question 12

How is a LBBB Diagnosed (WiLLiaM)

Answer 12

S in V1

R in V5/6

Question 13

How is a RBBB Diagnosed (MaRRoW)

Answer 13

R in V1

S in V5/6

Question 14

What are the 2 normal heart sounds

Answer 14

S1

S2

Question 15

What are the 2 pathological heart sounds

Answer 15

S3

S4

Question 16

What does the S1 represent

Answer 16

Mitral and Tricuspid

Question 17

What does the S2 represent

Answer 17

Atrial and Pulmonary

Question 18

What does the S3 represent

Answer 18

Rapid ventricle filling @ early diastole

• Mitral regurgitation
• Heart fail

Question 19

What does the S4 represent

Answer 19

Pathological Gallop (Blood forced into hypertrophic ventricle)

• LVH
• Aortic stenosis

Question 20

What is the difference between the actions causing S3 and S4

Answer 20

S3 = Rapid filling of ventricle
S4 = Forced filling of hypertrophic ventricle

Question 21

Mitral regurgitation and heart fail share what heart sound

Answer 21

S3

Question 22

Aortic stenosis and LVH share what heart sound

Answer 22

S4