ECG Changes + Territories

Question 1

V1-V4 - territory + coronary artery?

Answer 1

Anteroseptal - left anterior descending

Question 2

II, III, aVF - territory + coronary artery?

Answer 2

Inferior - right coronary

Question 3

V1-6, I, aVL - territory + coronary artery?

Answer 3

Anterolateral - proximal left anterior descending

Question 4

I, aVL, +/- V5-6 - territory + coronary artery?

Answer 4

Lateral - left circumflex

Question 5

V1-3, horizontal ST depression, tall broad R waves, upright T waves (reciprocal changes of STEMI) - territory + coronary artery?

Answer 5

Posterior - left circumflex + right coronary

Question 6

ECG change confirming posterior infarction?

Answer 6

ST elevation in posterior leads (V7-9)

Question 7

Down-sloping ST depression, flat T waves, short QT interval, arrhythmias?

Answer 7

Digoxin

Question 8

U waves, small/absent T waves, long PR interval, ST depression, long QT?

Answer 8

Hypokalaemia

Question 9

J waves, long QT, bradycardia, 1st degree HB?

Answer 9

Hypothermia

Question 10

W in V1, M in V6?

Answer 10

LBBB (investigate for ACS if new)

Question 11

M in V1, W in V6?

Answer 11

RBBB

Question 12

3 non-ACS causes of LBBB?

Answer 12

Hypertension, aortic stenosis, cardiomyopathy (think LV dysfunction)

Question 13

Long-lasting ECG changes after MI?

Answer 13

T wave inversion (days to months)
Q waves (indefinitely)

Question 14

Increased P wave?

Answer 14

Cor pulmonale

Question 15

Broad notched/bifid P waves?

Answer 15

Left atrial enlargement classically mitral stenosis