Ebstein’s Anomaly with Pulmonary Atresia

(See Normal Heart Image for comparison)

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Ebstein’s Anomaly: The tricuspid valve (t) [controling blood flow between the right atrium and the right ventricle] is abnormally formed.  This tricuspid valve is long and sits deep in the right ventricle.  It’s function is limited.  Ebstein’s Anomaly often presents with pulmonary atresia and septal defects. 

  • Atrial Septal Defect (ASD) [septum=wall between the chambers of the heart, atriums=top chambers of the heart] – holes in the inner walls of the heart allowing extra blood flow between the two upper chambers of the heart (atriums).
  • Patent Ductus Arteriosus (PDA) [patent=open, ductus=duct, arteriosus=artery] – an extra passageway between the pulmonary artery (carrying oxygen-poor blood from the heart to the lungs) and the aorta (carrying oxygen-rich blood from the heart to the body).  The ductus arteriosus is open in a fetus.  This allows extra bloodflow in the forming baby while it’s getting oxygen from Mom instead of its own lungs.  The PDA normally closes around 10 days after birth.
  • Pulmonary Valve Atresia (atresia) [pulmonary=having to do with the lungs, atresia=without openings] a complete blockage of the pulmonary artery (which carries blood from the heart to the lungs) caused by a missing or fused-shut pulmonary valve.
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