(a) Wild type mice (n = 3) have normal dimensions of the cardiac chambers (solid line). The interventricular septum, an indicator of intrinsic myocardial muscle development, is also normal (arrow).
(b) PGT Neo/Neo mouse (n = 3) shows dilated right and left ventricular chambers (lines), but the interventricular septum, an indicator of intrinsic heart muscle development, is normal (arrow).
(c) PGT −/− mouse (n = 3) shows finding similar to (b).