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Table 1 Morphological Findings in Ebstein's Anomaly

From: Ebstein's Anomaly: Anatomo-echocardiographic correlation

Right ventricular region

Morphological finding

 

N = 30

Inflow Tract

Degree of tethering

I

II

III

5

10

15

 

Tricuspid dysplasia

 

30

 

Dilatation of the anatomic atrioventricular ring

Mild

Moderate

Severe

10

5

15

 

Functional tricuspid opening

Low

Dilated stenotic

30

15

15

 

Ventricular wall

Aneurysmal sac

Normal

27

3*

Trabecular Portion

Uncovered

100%

5

 

Covered by leaflet tethering

25%

50%

100%

10

5

10

 

Anomalous apical muscular bands

 

30

Outflow tract (infundibulum)

Normal

Stenotic

Dilated

 

5

5

20

 

Pulmonary Valve

Normal

Stenosis

Atresia

20

5

5

Associated Abnormalities

 

ASD (Ostium secundum)

20

  

Patent foramen ovale

5

  

ASD + VSD

5

  

Cleft mitral valve

1

  

Moderator band in left ventricle

1

  

Transposition of great vessels*

2

  

Right ventricular double outlet*

1

  1. *Atrioventricular discordance
  2. ASD: Atrial septal defect; VSD: Ventricular septal defect.