Cor Triatriatum


Atrium, Subdivided Left

Atriums, Subdivided Left

Cor Triatriatum Sinistrum

Heart, Triatrial

Hearts, Triatrial

Left Atrium, Subdivided

Left Atriums, Subdivided

Subdivided Left Atrium

Subdivided Left Atriums

Triatrial Heart

Triatrial Hearts

A malformation of the heart in which the embryonic common PULMONARY VEIN was not incorporated into the LEFT ATRIUM leaving behind a perforated fibromuscular membrane bisecting the left atrium, a three-atrium heart. The opening between the two left atrium sections determines the degree of obstruction to pulmonary venous return, pulmonary venous and pulmonary arterial hypertension.