ECG changes

Question 1

Atrial fibrillation?

Answer 1

Irregularly irregular

Absent/inconsistent P wave on ECG

Question 2

Wolf Parkinson syndrome?

Answer 2

Delta wave is slurred upwards due to ventricular pre-excitation and shortened PR interval (<0.12ms)

Question 3

Atrial flutter?

Answer 3

Saw tooth ECG

Question 4

Heart block - prolonged PR interval?

Answer 4

1st degree

Question 5

Heart block - Mobitz 1?

Answer 5

2nd degree

Progressive PR prolongation leading to dropped QRS

Question 6

Heart block - Mobitz 2?

Answer 6

2nd degree
Common ratio 2:1, 3:1, 4:1
Constant PR interval or Random and QRS complex drop

Question 7

3rd degree heart block?

Answer 7

No PR interval and complete dissociation between the P wave and QRS

Question 8

Atrial fibrosis?

Answer 8

Low altitude P wave

Question 9

Broad QRS complex?

Answer 9

Conduction delay

Question 10

Small QRS complex?

Answer 10

Pericardial effusion and obese patient

Question 11

Tall QRS complex?

Answer 11

Thin patient , Left ventricular hypertrophy

Question 12

QT interval slow and rapid repolarization is indicative of?

Answer 12

Arrhythmogenic

Question 13

MI, pericarditis, myocarditis, early repolarisation?

Answer 13

ST segment elevation

Question 14

Saddle shaped ST and PR depression?

Answer 14

Pericarditis

Question 15

Inverted T wave can indicate?

Answer 15

MI (hypertrophy), ischemia/infarction, cardiomyopathy

Question 16

Hyperkalaemia?

Answer 16

Tall T, flat P, broad QRS

Question 17

Flat T wave and QT prolongation?

Answer 17

Hypokalemia

Question 18

Hypercalcemia?

Answer 18

QT shortened

Question 19

Hypocalcemia?

Answer 19

QT prolongation

Question 20

P wave length normally?

Answer 20

<0.12s

Question 21

PR interval?

Answer 21

0.12-0.2s

Question 22

QRS complex length?

Answer 22

0.12s

Question 23

QT interval length?

Answer 23

<0.4-0.44s

Question 24

ST segment length?

Answer 24

0.08s