Collett and Edwards classification of truncus arteriosus (diagram)

Case contributed by Dr Vincent Tatco

This diagram depicts the classification of truncus arteriosus devised by Collett and Edwards:

  • type I: aorta and main pulmonary artery share a common arterial trunk
  • type II: right and left pulmonary arteries arise separately from the posterior part of truncus
  • type III: separate origins of the pulmonary arteries from the lateral aspect of the truncus
  • type IV: neither pulmonary arterial branch arising from the common trunk with the lungs supplied by collaterals (pseudotruncus)

(AA - ascending aorta; DA - descending aorta; MPA - main pulmonary artery; RPA - right pulmonary artery; LPA - left pulmonary artery; PDA - patent ductus arteriosus; VSD - ventricular septal defect; RA - right atrium; LA - left atrium; RV - right ventricle; LV - left ventricle)

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Case information

rID: 51895
Published: 12th Mar 2017
Last edited: 14th Aug 2019
System: Cardiac
Inclusion in quiz mode: Excluded

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