Partial anomalous pulmonary venous connection or Cor-triatriatum - A confliction between preoperative versus intraoperative diagnosis

Both Cor-triatriatum and partial anomalous pulmonary venous connection(PAPVC) come under the rare spectrum of congenital heart diseases. These entities may co-exist in a patient or may appear independent of each other. Since their clinical presentation remains the same, it comes down to the cardiac imaging modality used. Here we describe a case of a 45-year female presenting with exertional dyspnea and palpitations who was diagnosed with cor-triatriatum in the preoperative echocardiography which intraoperatively was identified to be PAPVC. This case report highlights the peculiarities of echocardiographic findings in this patient and the importance of multimodal imaging techniques in such cases.