<prompt> In septum primum type of ASD overburden occurs in which chamber?RA RVLA LVRA LALA  <response>: - In ASD ostium primum as well as secundum overload of Right atrium and right ventricle occurs due to left to right shunting of blood. - Left atrium Left ventricle enlargement - VSD, PDA - Left atrium enlargement - Mitral stenosis 