Heart palpitations can be caused by a variety of factors. Usually, it is triggered by an adrenaline rush or a change in mood. Anyone who notices their heartbeat becoming increasingly irregular should seek medical attention immediately. Arrhythmia is the medical name for an irregular heartbeat. It is important to address the situation seriously because arrhythmia can lead to a stroke if left untreated. If you experience this symptom, you should see a doctor.