What is the most common acyanotic heart disease observed in infants?

Ventricular septal defect (VSD) is recognized as the most common acyanotic heart disease observed in infants. This condition involves a defect or hole in the ventricular septum, which is the wall dividing the left and right ventricles of the heart. The presence of this defect allows oxygen-rich blood from the left ventricle to flow into the right ventricle, and subsequently into the lungs, rather than being pumped out to the body.

This left-to-right shunt typically does not lead to cyanosis, which is a key characteristic of acyanotic heart diseases. While VSDs can lead to increased pulmonary blood flow and later complications if left untreated, they are classified as acyanotic because the oxygen saturation in the blood remains adequate.

Other conditions listed, such as atrial septal defect (ASD) and patent ductus arteriosus (PDA), are also common forms of acyanotic heart defects but occur less frequently in infants than VSDs. Coarctation of the aorta, on the other hand, is a different kind of defect that typically presents with symptoms related to obstructed blood flow and can lead to significant complications, but it is not classified under common acyanotic defects