Heart arrhythmias may not cause any signs or symptoms. A doctor may notice the irregular heartbeat when examining you for another health reason. In general, signs and symptoms of arrhythmias may include: 
A fluttering in the chest
A racing heartbeat (tachycardia)
A slow heartbeat (bradycardia)
Chest pain
Shortness of breath
 Other symptoms may include: 
Anxiety
Fatigue
Lightheadedness or dizziness
Sweating
Fainting (syncope) or near fainting
