Table 2 Echocardiographic characteristics of atrioventricular septal defects

Position (Situs)

Solitus

11

32

Inversus

4

12

Dextroisomerism

12

35

Levoisomerism

7

21

AV Connection

Concordant

15

44

RVDI

8

23

SVDI

4

12

Ambiguous

4

12

LVDI

3

9

V-A Connection

RVDO

14

41

Concordant

10

29

Discordant

6

18

SVDO

4

12

Associated anomalies

Pulmonary stenosis

14

41

Pulmonary atresia

5

15

Pulmonary hypertension

7

20

Patent ductus arteriosus

2

6

Anomalous connection of pulmonary veins

9

26

AV valve dysplasia

2

6

Valve regurgitation

15

44

Obstruction of the LV outflow tract

1

3

Single coronary ostium

1

3