ECG

Question 1

What does the P wave represent

Answer 1

• atrial depolarisation

Question 2

How do you calculate heart rate on a regular heart rate?

Answer 2

• how many large squares in R-R interval

- 300/how many squares

Question 3

How do you calculate heart rate on an irregular rhythm?

Answer 3

• number of cardiac cycles in 6s(30 large squares) x10

Question 4

Normal QRS width?

Answer 4

• 0.12seconds

1. 5-3 small boxes

Question 5

Narrow QRS suggests?

Answer 5

• atrial origin or SA node

Question 6

Broad QRS suggests?

Answer 6

• ventricular in origin

Question 7

Prolonged PR may indicate

Answer 7

• AV block

Question 8

Shortened PR interval may indicate

Answer 8

• accessory pathway

Question 9

Treatment of bradycardia

Answer 9

• atropine