Whether an infant with a 3mm ventricular septal defect is serious or not cannot be generalized, but needs to be determined based on the location of the infant’s ventricular septal defect and whether there are any complications.
Ventricular septal defects are caused by incomplete development of the interventricular septum during embryonic development, resulting in the formation of an abnormal blood flow pathway between the right and left ventricles of the infant. Depending on the location of the defect in the ventricular septum, it can be categorized as perimembranous, myxomatous, or subdual arterial. The myocardial type can be further categorized as myocardial trabeculae, inflow tract myocardium, or outflow tract myocardium.
Infantile ventricular septal defects of 3 mm are generally not serious if they occur in the perimembranous and myotrapezial regions and in the absence of other congenital cardiovascular malformations and diseases. It has no significant effect on the infant’s mobility or growth, and is likely to heal spontaneously within 5 years of age.
Infantile ventricular septal defects of 3mm rarely heal spontaneously if they occur in other parts of the ventricular septum and are prone to complicate with other heart diseases, which may have a greater impact on life and are still serious enough to require prompt treatment.
If the test results indicate that the infant has a 3mm ventricular septal defect, it is important to go to the hospital in time for treatment under the judgment and advice of the doctor.