Lecture 5 practise questions

Question 1

How would you recognise atrial fibrillation (AF) on the ECG trace?

Answer 1

No visible P waves (1).

 Tiny, irregular fibrillation waves between heartbeats (1).

 Irregularly irregular rhythm (1).

Question 2

Describe the normal ECG changes during exercise

based on Hill and Timmis, 2002

Answer 2

P wave increases in height

R wave decreases in height

J point becomes depressed.

ST segment becomes sharply upslopping.

Q-T interval shortens

T wave decreases in height

Question 3

Describe the electrocardiographic criteria for myocardial ischaemia during an exercise test.

Answer 3

a

Question 4

Which findings (during a CPET) are suggestive of a high probability of ischaemic heart disease? (Hill and Timmis,2002)

Answer 4

ST depression >2mm (0.5).

 Downsloping ST depression (0.5).

 Early positive response (6min or low workload) (0.5).

 Persistence of ST depression for more than 6min into recovery (0.5).

 ST depression in 5 or more leads (0.5).

 Exertional hypotension (0.5)