<prompt> Wolff - Parkinson - White WPW syndrome is characterised byProlonged PR intervalDelta waveU waveHeart block  <response>: Delta wave 1316, 1351-H 1393-H17thWPW-Svndrome - Triad consist ofI Wide QRS complex associated with relatively short PR interval 0.12sII Slurring of the initial part of the QRS delta waveIII Aberrant activation of ventricular myocardiumTreatment of WPW syndrome and AFI DC cardioversion life threateningII Lidocaine or procainamide non-life threatening situations 