Differentiation between common arterial trunk and pulmonary atresia with ventricular septal defect in foetal echocardiography
| Cardiac structure . | CAT . | Pulmonary atresia with VSD . |
|---|---|---|
| Cardiac axis | 70–85° | 50–70° |
| Overriding vessel | Very large | Slightly enlarged |
| Arterial valve | Usually dysplastic | Normal |
| Arterial velocity | Usually increased | Normal |
| Pulmonary artery size | Normal or slightly bigger | Often hypoplastic |
| Pulmonary artery flow | From the common trunk, forward | Reverse from the arterial duct |
| Collateral arteries | Absent | May be present |
| Cardiac structure . | CAT . | Pulmonary atresia with VSD . |
|---|---|---|
| Cardiac axis | 70–85° | 50–70° |
| Overriding vessel | Very large | Slightly enlarged |
| Arterial valve | Usually dysplastic | Normal |
| Arterial velocity | Usually increased | Normal |
| Pulmonary artery size | Normal or slightly bigger | Often hypoplastic |
| Pulmonary artery flow | From the common trunk, forward | Reverse from the arterial duct |
| Collateral arteries | Absent | May be present |
CAT: common arterial trunk; VSD: ventricular septal defect.
Differentiation between common arterial trunk and pulmonary atresia with ventricular septal defect in foetal echocardiography
| Cardiac structure . | CAT . | Pulmonary atresia with VSD . |
|---|---|---|
| Cardiac axis | 70–85° | 50–70° |
| Overriding vessel | Very large | Slightly enlarged |
| Arterial valve | Usually dysplastic | Normal |
| Arterial velocity | Usually increased | Normal |
| Pulmonary artery size | Normal or slightly bigger | Often hypoplastic |
| Pulmonary artery flow | From the common trunk, forward | Reverse from the arterial duct |
| Collateral arteries | Absent | May be present |
| Cardiac structure . | CAT . | Pulmonary atresia with VSD . |
|---|---|---|
| Cardiac axis | 70–85° | 50–70° |
| Overriding vessel | Very large | Slightly enlarged |
| Arterial valve | Usually dysplastic | Normal |
| Arterial velocity | Usually increased | Normal |
| Pulmonary artery size | Normal or slightly bigger | Often hypoplastic |
| Pulmonary artery flow | From the common trunk, forward | Reverse from the arterial duct |
| Collateral arteries | Absent | May be present |
CAT: common arterial trunk; VSD: ventricular septal defect.
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