Physiology Heart, Circulation, and Blood d2063f81 P wave is absent A Atrial fibrillation B CCF C Atrial flutter D PSVT High-Yield Explanation Ans. (a) Atrial fibrillationRef: Ganong, 25th ed/p.524P wave is absent in atrial fibrillationInstead of p waves, only fibrillatory f waves are seenP wave is absent also in hyperkalemia