"The so-called 'palpitation' refers to a person's obvious heartbeat or irregular rhythm that causes inner panic. 'Palpitation' is one of the common symptoms of heart disease, and is another popular expression of the cardiovascular disease symptom - 'heart flutter'. Patients with insufficient heart function will have accelerated heartbeats and palpitations during exercise; patients with arrhythmia will also experience palpitations whenever there is an abnormal heart rhythm."