Lesson 3, Topic 4
Right Ventricular Enlargement
- Presence of an S wave in leads I, II, and III.
- MEA in the frontal plane shifted to the right (pointing to the right ventricle): 100o to – 75o
- Deep S wave in lead V3; S >= 0.7 mV
- S>R in lead V3
If all 4 criteria are present, there is strong evidence of right ventricular enlargement. The presence of 1 or 2 criteria is still strongly suggestive of right ventricular enlargement
Cat: MEA in the frontal plane shifted to the right (points to the right ventricle): 160° to -75°