| Type | MGI:General | Description | left ventricular end-systolic area and left ventricular end-diastolic area are higher at 6 and 9 months of age but not at 3 months, indicating progressive left ventricle enlargement with age left ventricular end-systolic area is increased over 80% from 3 to 9 months of age fractional area change is decreased between 3 and 9 months of age by about 20% |