Ventricular Septal Defect
Ventricular Septal Defect is a hole in the wall between the right and left ventricles of the heart, which usually develops before birth. This defect can lead to right and left ventricles working quite hard leading to their failure. Blood returning to the heart from the blood vessels backs up into the lungs, causing pulmonary congestion, and further backup into the body, causing weight gain and fluid retention.
Small VSDs' are symptomless and closed spontaneously as the child grows, but the large VSDs' cause symptoms like difficulty in breathing and feeding, poor growth and pallor. The symptoms occur due to the increase in size of the right ventricle (right ventricular hypertrophy) and increase in pressure inside the lungs (pulmonary hypertension).