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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.