Thanks for writing us..
This irregularity of heart is known as Arrhythmias, may be due to presence of extrasystole, Paroxysmal supraventricular arrhythmia or Atrial flutter or Fibrillation
For confirmation you get 12 lead ECG, ECHO and if required Holter monitoring.
You get Ecg done especially when symptoms are present.
I will be happy to help you after getting reports..