6- MI In A 12 Lead

Question 1

What areas does the Right Coronary Artery supply

Answer 1

• Right lateral

- Inferior

Question 2

What areas does the 2 divisions Left Coronary Artery supply and name both

Answer 2

• Left Circumflex
  Left lateral
• Left Anterior Descending
  Septal
  Anterior

Question 3

What is the difference between a Transmural and Subendocardial MI

Answer 3

• Transmural is the entire thickness of the myocardium

- Subendocardial is just the internal layer of the myocardium

Question 4

Characteristics of the 5 stage evolution of an MI

Answer 4

1- Hyperacute
Peaked T wave, 0-4 hrs

2- Acute
Elevated ST, less than 12 hrs

3- Evolving
Inverted T wave, loss of R wave, 24-96 hrs

4- Fully evolved
Pathological Q wave, 2 weeks

5- Healed
Permanent Q wave, regular complexes, 1 year

Question 5

How to identify an Anterior MI

Answer 5

Elevation in V3, V4

Question 6

How to identify an Anteroseptal MI

Answer 6

Elevation in V1-V4

Question 7

How to identify an Anterolateral MI

Answer 7

Elevation in V2-V6, 1, aVL

Depression in 3, aVF

Question 8

How to identify a Lateral MI

Answer 8

Elevation in 1 and aVL

Depression in V1-V3

Question 9

How to identify an Inferior MI

Answer 9

Elevation in 2, 3, aVF

Depression in V2-V4