Inferior AMI

Question 1

Inferior AMI Stats

Answer 1

40-50% of AMIs
Mortality 2-9% in hospital
Worse outcome if:
- RV infarction approx 40%
- if bradycardia (2nd/ 3rd degree AV block) approx 20%
- also Posterior AMI

Question 2

Inferior AMI ECG changes

Answer 2

STE II, III, aVF
Progressive Q waves II, III, aVF
Reciprocal ST depression aVL +/- I

Question 3

Inferior AMI Arterial Supply

Answer 3

RCA: 80%
- STE III > II
- ST depression I + RV infarct
LCx: 18%
- STE II=III
- STE aVL & I
- absent ST depression I

Question 4

Inferior AMI

Answer 4

Watch out for aVL

ST depression/ TWI precedes Changes in inferior leads

Question 5

Inferior AMI complications

Answer 5

AV nodal block- RCA supply
- bradycardia, 2nd/ 3rd degree block
Pre load dependent: worse if RV involved
- hypotension with GTN
- mx with fluids/ atropine