Final answer:
Partial anomalous pulmonary venous return is typically seen with a secundum atrial septal defect (ASD).
Step-by-step explanation:
Partial anomalous pulmonary venous return (PAPVR) is typically seen with a secundum atrial septal defect (ASD). An ASD is a congenital heart defect that involves an abnormal opening in the atrial septum, the wall that separates the two upper chambers of the heart. In PAPVR, one or more of the pulmonary veins connect to the right atrium or one of its tributaries instead of properly draining into the left atrium. This can lead to oxygen-rich blood mixing with oxygen-poor blood, reducing the overall efficiency of oxygen delivery to the body.