Bradycardia can present with symptoms such as dizziness, chest tightness, breathlessness, fainting, and other symptoms, resulting in harm including insufficient blood supply to the organs, and in severe cases, death. Bradycardia is defined as a heart rate of less than 60 beats per minute. When the heart rate is too slow, cardiac output decreases and blood supply to peripheral organs decreases, which can lead to lower blood pressure, insufficient blood supply to the brain, and even lead to cerebral infarction, renal failure, liver failure and other multiple organ malfunctions, which can lead to death in severe cases. In addition to the above mentioned hazards, some symptoms may occur in the case of bradycardia, including dizziness, fatigue, palpitations, chest tightness, dyspnea, blackness, fainting, etc. It is therefore recommended to seek timely medical attention if necessary. Therefore, it is recommended that timely medical attention is needed for standardized diagnosis and treatment when necessary.