There are many clinical causes of rapid heartbeat, either physiological or pathological. Physiological causes can be due to mental stress, emotional excitement, exertion, insomnia, strong tea and coffee. Pathological causes can be seen in heart diseases, such as heart failure, hypertensive heart disease, rheumatic heart disease, coronary heart disease, dilated cardiomyopathy, myocarditis, and tachyarrhythmia. Other systemic diseases, such as anemia and hyperthyroidism, can also cause a rapid heartbeat. Therefore, if you have experienced a recurrent rapid heartbeat recently, it is recommended that you go to the hospital and have the relevant tests done to determine the cause of the rapid heartbeat so that targeted treatment can be given.