The possible hazards of high pulse rate are as follows: First, if the pulse rate is high, it may lead to reduced cardiac output per beat, reduced pump function, reduced ejection fraction, leading to acute or chronic heart failure, clinical manifestations of tightness of breath, dyspnea, and in severe cases, involving the lungs, with reduced oxygen saturation, thus endangering life; Second, there are possible hazards of high pulse rate are The high pulse rate may also lead to malignant arrhythmias, such as ventricular fibrillation, loss of consciousness and life-threatening.