Cor tiatriatum
Cor tiatriatum presenting as a non-obstructing membrane in the left atrium.

Long axis view of a non-obstructive membrane in the left atrium consistent with
'cor triatriatum'.
Apical 4 chamber view of a non-obstructive membrane in the left atrium consistent with
'cor triatriatum'.
Color doppler apical 4 chamber view shows the membrane in the left atrium is non-obstructive .