P648 Right heart volume overload after surgical correction of atrial septal defect sinus venosus type with partial anomalous pulmonary veins drainage

Abstract

Abstract 40 year-old male with history of congenital heart disease. Atrial septal defect (ASD) sinus venosus type associated with partial anomalous pulmonary venous drainage (PAPVD) was diagnosed during childhood and surgically repaired at the age of three. Since then the patient was asymptomatic and he was lost to follow up when reached adulthood. A transthorathic echocardiogram was performed during a hospitalization because of a complicated pneumonia. A severe dilatation of right chambers and main pulmonary artery was observed. The estimated Qp:Qs by this technique was 2.0 but the atrial septum seemed to be intact. Agitated saline was administered in this procedure and no passage of microbubbles was observed. A cardiac MRI was performed because of suspicion of anomalous pulmonary venous drainage. The findings observed in the echocardiogram were confirmed and an uncommon PAPVD was demonstrated by this technique: the superior left pulmonary vein drainaged into a dilated innominated vein. Also, a small pulmonary vein from the right upper lobe emptied into a "venous conduct" (yellow circle) located posterior to the superior cava vein (SCV) that later drainaged into the right atrium under the mouth of the SVC, posterior to the interatrial septum. Surgically correctioin of the PAPVD was performed. Discussion PAPVD is a congenital heart disease characterized by the drainage of one or several pulmonary veins –but not all of them- into the right atrium or systemic veins, which leads to left-to-right shunting. The estimated incidence of this disease ranges between 0.1 and 0.2% of the general population. The right superior pulmonary vein is the most frequently involved and is commonly associated to ASD sinus venosus type. Bilateral anomalous drainage, as occurred in this case, is exceptional. Furhermore, this case highlights the importance of long-term follow-up in patients with congenital heart disease due to the fact that, even when the disease is considered to be cured, long term complications could appear compromising the prognosis of the patient. Abstract P648 Figure. Unusual PAPVD