Arrhythmia can be silent and not have any symptoms. In such cases, the doctor will notice that you have an irregular heartbeat during a medical test/examination. They will observe your pulse, listen to your heart, or perform a series of diagnostic tests. Once the symptoms are observed, they will include-
Heart palpitations
Pounding feelings in the chest
Feeling lightheaded or dizzy
Shallow breathing
Feeling discomfort in the chest
Fatigue or weakness