<prompt> Causes of wide fixed splitting of second heart sound include all except:Atrial septal defectEbstein anomalyTotal anomalous pulmonary venous returnRight bundle branch block  <response>: b. Ebstein anomalyRef: Nelsons 20e p 2190Wide fixed splitting of second heart sound is seen in Atrial septal defect, Total anomalous pulmonary venous return TAPVC and Right bundle branch block RBBB 