Hi, What you had is known as Palpitations. Palpitations are often benign. Less than half of patients with palpitations suffer from an arrhythmia and not every identified arrhythmia is of clinical or prognostic significance. Short-lived irregularities, such as missed beats, fluttering sensations or extra beats, are often caused by ectopy. It is of value to know the duration and frequency of palpitations to understand the impact on the patient’s life. Just palpitations without any other features like blackout episodes, Breathless, etc and that too occuring occasionally are of less clinical significance. Most common causes are Anxiety and depression, Caffeine, Alcohol, Illicit drugs, such as cocaine, amphetamines, ecstasy, medication such as beta-agonists, theophyllines, calcium channel blockers, antiarrhythmic drugs, antidepressants, antipsychotics. And rarely they also menefist as an underlying cardiac disease, but as mentioned earlier it has to have associated symptoms. If you keep getting these symptoms quite frequently then I would recommend that you get your ECG, Thyroid Function Tests done along with Holter Monitoring/Event Recorder, 2D Echocardiography.