<prompt> The most common accessory pathways leading to WPW syndrome is:Left free wallPosteroseptalRight free wallAnteroseptal  <response>: Answer is A Left free wall Left free wall accessory pathways are most common. Left free wall accessary pathways are most common followed by posteroseptal, right free wall and anteroseptal locations -Braunwald Hea Diseases: Review Assessment by Lilly 2012Q249 The most common accessary pathway connects the left atrium to the left ventricle followed by posterior septal, right free wall and anterior septal accessary pathways 