Normal ECG

Question 1

What is the normal range for PR interval?

Answer 1

0.12-0.2 s

Question 2

What is the normal time/width of QRS complex?

Answer 2

0.08-0.1 seconds

Question 3

What happens during QRS?

Answer 3

Ventricular depolarisation and atrial repolarisation

Question 4

What happens in the ST segment?

Answer 4

isovolemic ventricular relaxation

Question 5

What happens during the T wave?

Answer 5

Ventricular depolarisation

Question 6

What does a big box on an ECG (made of 5 small boxes across) represent?

Answer 6

0.2s
0.5mV

Question 7

What does each tiny box on an ECG represent?

Answer 7

0.04s
0.1mV

Question 8

Which 3 leads view the Right Coronary artery?

Answer 8

AVF
II
III

Question 9

Which leads view the Left Anterior Descending artery?

Answer 9

V1-4

Question 10

Which leads view the Left circumflex artery?

Answer 10

V5-6
AVL
I