Usually the vagus nerve has some effect on the heart function. First, if the vagus nerve is too strong, it will lead to a decrease in heart function, which will slow down the heart rate and will lead to a decrease in the output of the heart, so there will be a decrease in arterial pressure and a relative decrease in both systolic and diastolic blood pressure. Secondly, the effective atrial myocardial induction period is shortened, and there is a slowing of atrial conduction velocity. In addition, patients may experience dizziness, panic, palpitations, weakness, sweating, etc. Patients may also experience significant chest tightness and shortness of breath, especially when working too much or resting and sleeping poorly, and they may experience a series of effects such as typical vegetative nervous disorders.