Atrial fibrillation is random electrical activity in the atrium, with ventricular beats occurring irregularly. Ventricular depolarization occurs whenever an electrical impulse arrives at the AV node when it’s ready to conduct. QRS complexes may be wide when conduction block is present. The rate in atrial fibrillation may be very rapid, or slow, depending on the conductivity of the AV node.
I do not have personal experience and hope someone that has comes along to answer your question.