A heart rate of 40 beats per minute belongs to bradycardia, which can be categorized into physiological bradycardia and pathological bradycardia, and food can not promote its recovery, and it is necessary to clarify the specific causes of the disease and then carry out targeted treatment. 1. Physiological bradycardia: Generally speaking, the adult heart rate is less than 60 beats/minute called bradycardia, so the heart rate of 40 beats/minute belongs to the category of bradycardia. In the physiological state, it can be seen in sleep, also can be seen in engaged in heavy physical labor, professional athletes in a quiet state of rest. This situation does not belong to the disease state, can not be treated. 2. Pathological state: such as intracranial disease, severe hypoxia, hypothermia, hypothyroidism, obstructive jaundice and vasovagal syncope, etc., which can also lead to a decrease in the heart rate, appearing in the phenomenon of heartbeat of 40 beats / min. This may be accompanied by physical discomfort such as dizziness and panic, or even fainting. It can be treated with atropine or isoprenaline as prescribed by the doctor, and if bradycardia exists for a long time, it is recommended to install a pacemaker for treatment. For those with a heart rate of 40 beats per minute, it is recommended to seek medical attention in time and follow the doctor’s instructions for examination and treatment.