<prompt> Wide QRS duration is-0.8sec0.9sec Pattern.12secAll the above  <response>: a wide qrs complex by definiton is more than 120 ms The QRS complex duration is wide 0.12 seconds or 3 small boxes in every lead. Causes of a widened QRS complex include right or left BBB, pacemaker, hyperkalemia, ventricular preexcitation as is seen in Wolf-Parkinson-White pattern, and a ventricular rhythm. Ref Harrison 20th edition pg 1576 