P wave is absent in-: (A) Atrial fibrillation, (B) Atrial asystole, (C) Ventricular fibrillation, (D) Ventricular tachycardia
Answer is A. 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