An Arrhythmia is also referred to as cardiac arrhythmia or heart arrhythmia is defined as irregular heartbeat or heart sound. It is a condition where the heart beats too quickly or too slowly. If the heart rate is too fast i.e. 100 beats per minute in an adult is known as tachycardia, and a heart rate is too slow i.e. below 60 beats per minute that are known as bradycardia. Some kind of arrhythmia does not have any symptoms. Most of the arrhythmia cases are not serious, but in some conditions may cause sudden death. It also leads to cardiac arrest.