According to other authors, in children with an interventricular septal defect, Ki67+/troponin T+ RV CMCs at the age of 0–six months is 0.23 ± 0.05%, at seven–12 months their number decreases to 0.02 ± 0.01%, and at the age of over 12 months, it is 0.01 ± 0.01% [51]. This evidence concerns the gene MKI67 and ventricular septal defect.