<prompt> P wave is absent in-Atrial fibrillationAtrial asystoleVentricular fibrillationVentricular tachycardia  <response>: Absence of the P wave with a flat baseline may indicate: Fine atrial fibrillation Sinoatrial arrest with a secondary escape rhythm in ventricular fibrilation ,ventriculat tachycardia and atrial asystole,a waves are present Ref Harrison 20th edition pg 1423 