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 2017-05-19  Case of the week # 446  © Fabrice Cuillier  www.TheFetus.net
Answer to the case of the week # 446
May 25, 2017 - June 8, 2017

Cuillier F.1, MD, Arsac L.A.2, MD, Alessandri J.L.3, MD, Doray B., Pr.4  
1Department of Gynecology, Hôpital Félix Guyon, Saint-Denis, Reunion Island, France.  
2Department of Neonatal Cardiology, Hôpital Félix Guyon, Saint-Denis, Reunion Island, France.  
3Department of Neonatology, Hôpital Félix Guyon, Saint-Denis, Reunion Island, France.  
4Department of Genetic, Hôpital Félix Guyon, Saint-Denis, Reunion Island, France.  



 
Case report:  

A 26-year old woman with unremarkable history was sent to our unit for an ultrasound scan. 
The following images and videos from our scan performed at 25 weeks show an isolated dilation of the right atrium.

The ventricles, interventricular septum, foramen oval, aorta and pulmonary artery were normal

We performed a follow up ultrasound every two weeks to evaluate fetal growth and persistence of the dilation of the right atrium. 
There weren´t signs of fetal arrhythmia, cardiomegaly or fetal hydrops (frequently observed in these cases).
Neither Ebstein’s anomaly or tricuspid regurgitation. The septal tricuspid leaflet was in normal position. 


The neonate was delivered at 38 weeks (3.600 gr.) and he was in good clinical condition.
An echocardiography was performed soon after birth and confirmed the idiopathic right atrium dilation, without tricuspid regurgitation or other anomalies.
 
The final diagnosis was idiopathic dilation of the atrium.  Congratulations to Javier Cortejoso for his answer!

 


Images 1-6: 2D and color doppler images of the dilation of the right atrium.

  
 


 
Videos 1-4: different views of the fetal heart show no other abnormalities.

  



Videos 5-10: the ventricles, interventricular septum, foramen oval, aorta and pulmonary artery were normal. 

   



Images 7-12: 
follow up images showing normal fetal growth and persistence of the dilation of the right atrium.

 
 
 
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