Anatomical Sites for MI

Question 1

Anterior MI
ST elevation?
Reciprocal St depression?
Coronary artery?

Answer 1

ST elevation in V1-V6
No reciprocal ST depression
Artery - LAD

Question 2

Septal MI
ST elevation?
Reciprocal St depression?
Coronary artery?

Answer 2

ST elevation in V1-V4, disappearance of septum Q waves in leads V5, V6
No reciprocal ST depression
Artery - LAD - septal branches

Question 3

Lateral MI
ST elevation?
Reciprocal St depression?
Coronary artery?

Answer 3

ST elevation in I, aVL, V5,V6
Reciprocal depression II, III, aVF
Coronary artery - LCX or MO

Question 4

Inferior MI
ST elevation?
Reciprocal St depression?
Coronary artery?

Answer 4

ST elevation in II, III, aVF
Reciprocal depression in I, aVL
Coronary artery - RCA (80%) or RCX (20%)

Question 5

Posterior MI

Answer 5

ST elevation in V7, V8, V9
No reciprocal ST depression
Coronary artery - RCX