<prompt> Paroxysmal AV block is associated with:First degree blockType I second degree blockType II second degree blockThird degree block  <response>: Ans. C. Type II second degree block Paroxysmal AV block are series of non-conducted P waves associated with Second-degree AV block particularly type II. It implies significant conduction system disease and is an indication for permanent pacing.ECG shows multiple non-conducted P waves after a period of sinus bradycardia with a normal PR interval. 