Overall fragility and an ongoing feeling of being tired. A person feels like the whole body is losing all power. Sometimes, the weakness can be defined as a localized drop in activity and strength. For example, after attending a soccer game, the individual may experience weakness in the area of legs, especially knees. The atrial fibrillation may be the reason for such thing to happen.

A breakneck symptom is another alarming sign. Patients with atrial fibrillation are light-headed round-the-clock. Such factor as irregular blood pressure is the first cause of this suffering. No matter whether the pressure is too high or too low, the patient might feel dizzy. If this symptom lasts for a while without stopping, it is better to visit the doctor.