You are incorrect - the most likely diagnosis in our patient is an isolated atrial septal defect.


Your choice: Atrial septal defect and mitral regurgitation

Patients with an atrial septal defect and mitral regurgitation typically present with a holosystolic murmur at the apex. The typical findings of an atrial septal defect and the holosystolic murmur of mitral regurgitation suggest an ostium primum atrial septal defect.