Cor Triatriatum

 

Image Library Home >>Congenital Disorders >> Cor Triatriatum

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

Cor Triatriatum occurs when either the right or left atrium has a flap or tissue or membrane that divides it into two chambers. The classical "Cor Triatrium sinister" is shown in this example where a membrane divides the left atrium into two parts, one receiving the pulmonary venous inflow and the other contain the left atrial appendage and contacting the mitral valve.
On first glance this parasternal long axis appears normal however.

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

A color window however shows that there is abnormal inflow within the left atrium. There also is some turbulence that appears to be in and around the mitral valve as the probe goes in and out of plane

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

The apical 4 chamber shows an abnormality in the left atrium which on this study is hard to distinguish at first from artifact.

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

A close up view shows that this is indeed a membrane.

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

It is also seen in the 2 chamber view making artifact much less likely to be the cause.

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

There is also associated turbulence on color Doppler with the membrane which either is not complete or is fenestrated and affects mitral valve inflow.

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

The subcostal also confirms the finding.

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

Complicating matters further this individual also had pulmonic vein stenosis as shown on the left.