ECG

Question 1

What does the P-wave correlate to?

Answer 1

Atrial Depolarisation

Question 2

What does the QRS complex correlate to?

Answer 2

Ventricular depolarisation

Question 3

What does the T wave correlate to?

Answer 3

Ventricular repolarisation

Question 4

What does the PR interval correlate to?

Answer 4

Time of transmission through the AV node

Question 5

What is the normal time of the PR interval?

Answer 5

0.1-0.2 seconds

Question 6

What does the QRS interval correlate to?

Answer 6

Time for the whole ventricle to depolarise

Question 7

What is the normal time for the QRS interval?

Answer 7

0.08 seconds

Question 8

What does the QT interval correlate to?

Answer 8

Time spent whilst the ventricles are depolarised

Question 9

What is the normal time for the QT interval?

Answer 9

Depends on HR

60bpm = 0.42s

Question 10

Which limb lead is always negative in terms of the QRS complex?

Answer 10

aVR

Question 11

What is the purpose of the precordial (chest) leads?

Answer 11

To look at the same information as before, but in a horizontal (transverse) plane`

Question 12

How many mm correlate to a second on the rhythm strip?

Answer 12

25