Tachycardia is defined as a heart rate of more than 100 beats per minute. In this case, if the heart rate is accelerated within a short period of time, after timely treatment with anti-arrhythmic drugs, the patient will usually regain the sinus rhythm and autonomic rhythm, and will not experience any obvious life-threatening situation. However, if prolonged tachycardia is not effectively controlled or if the patient develops malignant arrhythmia, the normal structure and function of the heart will be damaged, and significant heart failure will occur, with the most serious complication being cardiac arrest or even sudden cardiac death. Therefore, for accelerated heartbeat, it is necessary to actively treat with drugs, search for the original disease, according to the original disease, symptomatic treatment, and subsequently can be applied to anti-arrhythmic drugs to control the ventricular rate, which will reduce the chances of sudden death.