Sinus Venosus Atrial Septal Defect
Ganesh Athappan MD Ashley Davidof f MD
Sinus Venosus ASD is an anomaly of fetal development characterized by a defect in the upper atrial septum close to the SVC .
It is almost always associated with anomalous pulmonary venous drainage of the right upper pulmonary vein into the SVC.
Physiologically there is a shunting of blood from the left atrium to the right atrium
Clinically they are usually asymptomatic . A systolic ejection murmur with a fixed splitting of the second heart sound is heard over the second left intercostal space. EKG shows an abnormal p wav axis due to the proximity of the defect to the SVC and S-A node. Echocardiography confirms the diagnosis of a primum ASD. The direction of atrial level shunting can be detected by color Doppler.
Treatment is by surgical correction.
heart inteatrial septum ASD atrial septal defect secundum ASD primum ASD ASD of the sinus venosus type congenital Davidoff art copyright 2008 all rights reserved 01685c02.8