###Human: How to identify the reason for palpitations? ###Assistant: Hi. Palpitations can be out of two types. Sinus arrhythmia (only fast heart rate, but rhythm is normal) and this is not to be worried. Arrhythmias - There are many types of arrhythmias, some are atrial in origin and some are ventricular in origin. Revert back with the reports to a cardiologist online -->