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Classification of tricuspid valve atresia based on associated anatomic lesions

Classification of tricuspid valve atresia based on associated anatomic lesions
Type I Type II Type III
TV atresia with normally related great arteries:
  • Type a – Intact ventricular septum with pulmonary atresia
  • Type b – Small VSD with pulmonary stenosis/hypoplasia
  • Type c – Large VSD without pulmonary stenosis
TV atresia with D-transposition of great arteries:
  • Type a – VSD with pulmonary atresia
  • Type b – VSD with pulmonary stenosis/hypoplasia
  • Type c – VSD without pulmonary stenosis
TV atresia with malposition of the great arteries other than D-transposition of the great arteries, associated complex lesions (eg, truncus arteriosus, atrioventricular septal defects, double-outlet right ventricle)
TV: tricuspid valve; VSD: ventricular septal defect.
Reproduced with permission from: Epstein ML. Tricuspid atresia, stenosis, regurgitation. In: Moss and Adams Heart Disease in Infants, Children, and Adolescents. Allen HD, Driscoll DJ, Shaddy RE, Feltes TF (Eds), Lippincott Williams & Wilkins 2012. Copyright © 2012 Lippincott Williams & Wilkins.
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