A Rare Case of Cardiogenic Shock: Cor Triatriatum With Anomalous Pulmonary Venous Return.

Obstructive total anomalous pulmonary venous return (TAPVR) is a potentially life-threatening clinical condition and a surgical emergency. Left-sided partial anomalous pulmonary venous return (PAPVR) in association with a subdivided left atrium, also known as cor triatriatum sinister (CTS), is a very rare malformation that can mimic obstructive TAPVR. We present a case of a newborn with clinical manifestation of cardiogenic shock caused by CTS and PAPVR.