Where individuals experience atrial fibrillation that starts and stops, the result may be feeling drained after an episode. However, those with prolonged atrial fibrillation may not even realize there is a problem but simply feel excessively exhausted. The fatigue is triggered by the erratic heartbeat which causes the heart to work too hard.
In these cases, most people complain of not having as much energy as usual or that they do not feel like themselves. This sense of diminished capacity can then impact daily activities and routine chores.