Slow heartbeat: 1, is seen in sick sinus node syndrome, this kind of patient is in the absence of drug intervention, there is a significant sustained slowing of the heart rate, usually the heart rate is lower than 50 beats / min, the patient will appear a panic, chest tightness, shortness of breath, and even a transient blackout, fainting phenomenon. At this time, we should do electrophysiological further examination, if necessary, give pacemaker treatment. 2, seen in hypothyroidism patients, there will be a slow heart rate, in addition to the slow heart rate, accompanied by some mucous edema, the patient is afraid of cold, weight gain, these symptoms of hypothyroidism. At this time, it is recommended that the patient first undergoes a thyroid ultrasound to determine whether the cause is a thyroid cyst or a thyroid nodule, and to provide symptomatic treatment.