Annotated image
Celermajer severity index measures the area of the RA and atrialized RV (aRV) divided by the area of the functional RV(fRV), LA, and LV .
[RA+aRV]/ [fRV+LA+LV] from 4 chamber view.
It is graded from I to IV (grade I: index <0.5, grade II: 0.5–0.99, grade III: 1.0–1.49, grade IV >1.5).
Also with a left ventricular false tendon.