A heart defect, an atrial septal defect, was found in her daughter at a routine check-up when she was five months old. We couldn’t believe it and went with Maria for a re-examination at the Amosov Institute. Here the diagnosis was confirmed. The doctors decided to wait with the operation until the daughter grows up, and during this time, perhaps, the defect will close, then surgery will not be required. The daughter grows up active, rarely gets sick, but lately she gets tired quickly and has difficulty breathing. At the last consultation in May this year, it became clear that the defect had increased. Urgent surgery is needed. It can be done with a gentle, endovascular method, using an occluder - a special "patch". The operation itself will be performed on a quota basis. But you have to pay for the occluder, and we do not have the opportunity to collect the necessary amount on their own, because I’m on maternity leave, I take care of my daughter, My husband works as an engineer, we live on his salary and benefits. We ask for your help!