| Feature | Details |
|---|---|
Small defects | Echocardiography helps identify small septal defects that are haemodynamically insignificant and likely to close spontaneously. |
Larger defects | Serial echocardiography is used to check for signs of pulmonary hypertension. |
| Feature | Details |
|---|---|
Chest X-ray | Larger defects produce pulmonary congestion. |
Electrocardiogram (ECG) | Larger defects produce bilateral ventricular hypertrophy. |