ATRIAL SEPTAL DEFECTS
,ASD is an abnormal opening between right
and left atria resulting to left to right shunting
of blood
,
, There are 3major types of atrial septal defects
Ostium secundum ASD
Most common one
An abnormal opening in the middle of the atrial septum presents due to
the abnormal development of the septum secundum
Ostium primum ASD
It presents an abnormal opening at the bottom of the atrial septum due to
the improper development of the septum primum
There may bay be increased association with cleft mitral valve and atrio-
ventricular defects
Sinus venosus ASD
It is an abnormal opening at the top of the atrial septum
There is increased association with partial anomalous pulmonary venous
connection
Types
,ASD is an abnormal opening between right
and left atria resulting to left to right shunting
of blood
,
, There are 3major types of atrial septal defects
Ostium secundum ASD
Most common one
An abnormal opening in the middle of the atrial septum presents due to
the abnormal development of the septum secundum
Ostium primum ASD
It presents an abnormal opening at the bottom of the atrial septum due to
the improper development of the septum primum
There may bay be increased association with cleft mitral valve and atrio-
ventricular defects
Sinus venosus ASD
It is an abnormal opening at the top of the atrial septum
There is increased association with partial anomalous pulmonary venous
connection
Types
