Atrial fibrillation (AFib) is a type of arrhythmia or abnormal heartbeat caused by extremely fast and irregular beats from the upper chambers of the heart.
People with Afib experience their heart pounding, fluttering, or beating irregularly for a brief period of time. [Source: NHS.UK]
A few more symptoms that patients with Afib experience are:
A decreased blood flow to the heart muscle causes angina, which manifests as chest pain. [Source: Johns Hopkins]
Palpitations or a fluttering sensation in the chest, it feels like the heart is beating too fast or irregularly. [Source: Johns Hopkins]
Some patients may experience syncope, which is described as fainting or a short loss of consciousness. [Source: Johns Hopkins]
Few people with Afib might experience fatigue and extreme tiredness due to lack of energy.
A few other signs and symptoms of Afib include dizziness, shortness of breath, or breathing difficulties.