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Health Dictionary

Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.

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Endocardial cushion defect classification

Introduction

Overview

Overview

Based on the anatomical features and their impact on physiology, endocardial cushion defect may be classified into complete, partial, intermediate, transitional, and intermediate forms.

Classification

Classification

Based on the anatomical features and their impact on physiology, endocardial cushion defect may be classified into complete, partial, intermediate, transitional, and intermediate forms.[1]

Type Pathophysiology Characteristics
Complete AV canal Complete failure to fuse of superior and inferior cushions
  • Primum ASD
  • Posterior VSD
  • Common AV valve
Partial AV canal Incomplete fusion of the superior and inferior cushions
Transitional AV canal
  • Similar physiology of a partial AV canal defect
    • Dense chordal attachments to the ventricular septum lead to small insignificant ventricular shunting
    • Delineation of distinct left and right AV valve orifices
  • Large primum defect
  • Mitral valve cleft
  • Inlet VSD
Intermediate AV
  • Bridging tongue of tissue divides the common AV valve into two distinct orifices.
  • Large primum atrial
  • Inlet ventricular septal defects.
References

References

  1. ↑ Piccoli GP, Wilkinson JL, Macartney FJ, Gerlis LM, Anderson RH (December 1979). “Morphology and classification of complete atrioventricular defects”. Br Heart J. 42 (6): 633–9. doi:10.1136/hrt.42.6.633. PMC 482216. PMID 534580.

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Aditya Ganti M.B.B.S. [2]