Question: how to calculate ventricular rate in atrial fibrillation?
Answer: The best way to determine the ventricular heart rate would be to simply count the QRS complexes and multiply by 6, which would be 15 x 6 = 90 bpm. The P waves are not able to be identified in atrial fibrillation, and it is assumed that the atrial rate is between 400 and 600 bpm.