Wide fixed split S2 occurs in: (A) VSD, (B) Mitral stenosis, (C) ASD, (D) Coarctation of aoa
Answer is C. Ref Harrison 19 th ed pg 1447 Fixed splitting of S2 , in which the A2 -P2 interval is wide and does not change during the respiratory cycle, occurs in patients with a secundum atrial septal defect.