<prompt> Wenckebach bundle is:Involved in the hea blockThe fastest conducting pa in the heaAn abnormal connection between right atrium and ventriclesA bundle that relays impulse from SA node to AV node  <response>: Internodal tracts conducts impulses from SA node to AV node. Anterior - Bachmanns bundle. Middle - Wenckebachs bundle. Posterior - Thorels bundle. Bundle of Kent aberrant anomalous path connecting atria to ventricle; bypassing AV node. Characterized by delta wave on ECG. WPW syndrome. 