12 Lead Interpretation

Question 1

Lead changes with: V1-V2

1. Injury/Infarct related artery
2. Area of damage
3. Associated Complications

Answer 1

1. LCA: LAD septal branch
2. Septum, His Bundle, BB
3. Infranodal Block and BBBs

Question 2

Lead changes with: V3-V4

1. Injury/Infarct related artery
2. Area of damage
3. Associated Complications

Answer 2

1. LCA: LAD-diagonal branch
2. Anterior wall LV
3. LV dysfunction, CHF, BBBs, Complete Heart Block, PVCs

Question 3

Lead changes with: V5-V6, plus I and aVL

1. Injury/Infarct related artery
2. Area of damage
3. Associated Complications

Answer 3

1. LCA: circumflex branch
2. High Lateral Wall LV
3. LV dysfunction, AV nodal block in some

Question 4

Lead changes with: II, III, aVF

1. Injury/Infarct related artery
2. Area of damage
3. Associated Complications

Answer 4

1. RCA: posterior descending branch
2. Inferior wall LV, Posterior wall LV
3. Hypotension, sensitivity to Nitro and morphine

Question 5

Lead changes with: V4R (II,III,aVF)

1. Injury/Infarct related artery
2. Area of damage
3. Associated Complications

Answer 5

1. RCA: Proximal Branches
2. RV, Inferior Wall LV, Posterior Wall LV
3. Hypotension, supranodal blocks, a-fib/flutter, PACs, adverse medical reactions

Question 6

Lead changes with: V1-V4 marked depression

1. Injury/Infarct related artery
2. Area of damage
3. Associated Complications

Answer 6

1. Either LCA-circumflex or RCA-posterior descending branch
2. Posterior wall LV
3. LV Dysfunction