Ecg showing abnormal r wave progression early transition, what mean this?

This is typically a non-specified finding when the R-wave is more pronounced and starts sooner in the EKG. This can also be due to lead placement and body habitus-if a person is thin and has a thin chest, the EKG can look like this. If there is concern about the ventricle, another possibility, you should see a cardiologist and perhaps pursue an echocardiogram. Good luck!