<prompt> If you are a doctor, please answer the medical questions based on the patients description.My doughter aged 4 years with weight 17 kg. has ASD heart defect, here ecocardiogram Interpretation is - Fossa ovalis ASD16x17cm, left to right shunt. Adequate rims. Mild TR. TR max PG38mmHg. Mildly doming pulmonary valve. RVOT max PG28 mmHg. Dilated RA and RV. RVIDd2.6 cm, Normal ventricular function. Normal arch. Doctor advice for ASD device closure but we worried about it dont know result or any side effect after device fixing so kindly advice if this ASD size can be recover naturally with age growth or its compulsory to go for ASD closer device.Im writing this email with a hope to get complete advice.  <response>: You have a valid reason to worry about but ASD Device Closure is not so risky or complicated procedure. There are no long-term complications because of device. For your concern if closure is needed at all.as you have mentioned Rt heart dilation in your echocardiography report this indicates need of repair. SMALL ASD of less than 8 mm size usually heal by themselves but larger than 8 mm require closure either by device if suitable or by open surgery. I would advise go ahead with device if margins are adequate. 