<prompt> Paradoxical splitting of S2 is seen inPulmonary stenosisPulmonary hypeensionAoic stenosisCongenital absence of pulmonary valve  <response>: Paradoxical splitting: Reverse of normal physiology, splitting of second hea sounds during expiration, singular during inspiration Seen in conditions that cause delayed conduction down the left bundle LBBB, pre-excitation of the right ventricle, right ventricular pacing, premature RV beats, aoic stenosis ref - Harrisons internal medicine 20e pg1802-1805 