Cor triatriatum: A rare congenital cardiac disease in differential diagnosis

A four-month-old female infant with cough, rhinorrhea, and mild dyspnea was admitted to the emergency department and diagnosed with a viral illness. Chest radiograph showed moderate cardiomegaly and mild prominence of pulmonary vasculature. She was referred to the pediatric cardiology department. After examination, electrocardiogram showed sinus tachycardia with right axial deviation and right ventricular hypertrophy. Echocardiogram revealed the diagnosis of cor triatriatum sinistrum. An urgent surgical repair was decided (Figure 1). A written informed consent was obtained from each parent.