Surgical repair of an isolated left-sided partial anomalous pulmonary venous connection in an 18-month-old child.

The isolated left-sided partial anomalous pulmonary venous connection is a rare congenital anomaly. Only 3% of cases have been reported with drainage from the whole left lung into the left innominate vein. This anomaly is often asymptomatic and may go undetected (particularly in non-referral centers) until adulthood when symptoms begin to manifest. Transthoracic echocardiography is the main diagnostic tool; however, computed tomography angiography, and magnetic resonance imaging are widely used nowadays. Herein, we present the case of an 18-month-old girl with the diagnosis of isolated left-sided partial anomalous pulmonary venous connection as the left pulmonary veins were draining into the left innominate vein via a vertical vein. The patient underwent surgical repair by anastomosing the vertical vein to the left atrial appendage using cardiopulmonary bypass and cardiac arrest. The patient was discharged on the fifth day without complications. The precise follow-up for 12 months showed improved clinical symptoms, and the successively performed TTE confirmed the excellent result of the operation.