ECG

Question 1

What are the parts of a normal wave?

Answer 1

P wave
P-R interval 
QRS complex
ST segment
T wave
QT interval

Question 2

What is the p wave?

Answer 2

Atrial depolarisation

Question 3

What leads can the p wave be inverted in?

Answer 3

aVR

+/- III, aVL

Question 4

What does a tall p wave show?

Answer 4

Right atrial enlargement

Question 5

What does a bifid p wave show?

Answer 5

Left atrial enlargement

Question 6

What is the P-R interval?

Answer 6

Start of p -> start of R

Question 7

What is a normal P-R interval

Answer 7

012-0.2 s

3-5 small squares

Question 8

What does a prolonged P-R interval show?

Answer 8

First degree heartblock

Question 9

What does a shortened P-R interval show?

Answer 9

No SAN origin

- junctional rhythm

Question 10

What is the QRS complex?

Answer 10

Ventricular depolarisation

Question 11

What is the normal QRS complex time?

Answer 11

0.12 s

3 small squares

Question 12

What does a prolonged QRS complex show?

Answer 12

Bundle branch block

Question 13

What is the ST segment?

Answer 13

Start of S -> start of T

Question 14

What is ST elevation?

Answer 14

1mm in limb leads
2mm in chest leads

Shows acute myocardial infarction

Question 15

What is ST depression?

Answer 15

0.5 mm in limb leads
1mm in chest leads

Shows myocardial ischamia

Question 16

What is the T wave?

Answer 16

Ventricular repolarisation

Question 17

What does a tall T wave show?

Answer 17

Hyperkalaemia

Question 18

What do inverted T waves show?

Answer 18

Myocardial ischaemia

Question 19

What do pointed T waves show?

Answer 19

Pericarditis

Question 20

What is QT interval?

Answer 20

Start of Q -> end of T

Question 21

What should QT interval be?

Answer 21

< 1/2 of R-R

Question 22

What does a short QT interval show?

Answer 22

Tachycardia

Question 23

What does an increased QT interval show?

Answer 23

Torsades de pointes

Question 24

What are U wave?

Answer 24

Extra wave after T wave

Shows hypokalaemia