Is a pda (patent ductus arteriosus) considered a chd (congenital heart defect)..?

No: A PDA is a normal part of the cardiovascular system present in all newborns. After birth, the rising oxygen level of the blood usually triggers the closure of this bypass circuit. If it persists (very common in premature newborns) it may need specific management. However, it is not considered a heart defect.

Depends: It depends on the age of the patient. A patent ductus arteriosus persisting into adulthood is abnormal and could impose significant strain on the heart and may need to be closed. A PDA in a newborn is an expected finding.

Yes: We include patent ductus arteriosus in the list of congenital heart defects. Before birth, it is a normal connection between the pulmonary artery and aorta, allowing blood to bypass the lungs (because they are being used) to connect to the placenta to take up oxygen. Typically, the PDA closes in the first day. If it remains open, it can cause problems.

Yes: Yes - if it persists then it would qualify as chd and if it is audible in a child past infancy then it would ordinarily be closed in the cathetization laboratory.