Atrial septal defect
Epidemiology
Etiology
Pathophysiology
Clinical features
Auscultation
- Systolic ejection murmur over the second left ICS sternal border
- Relative pulmonary stenosis due to an increase in stroke volume. Not due to the defect!
- Widely split second heart sound (S2) over the second left ICS, which is fixed (does not change with respiration)