A slow heartbeat is not necessarily dangerous. Some normal people also have a slow heartbeat, but if it is slow and accompanied by obvious symptoms such as fainting and blackouts, it should be taken seriously and may be dangerous. Generally athletes and elderly people with heart rates less than 60 beats/min are normal, usually not dangerous, and often have no other accompanying symptoms. In addition, some patients taking beta-blockers, calcium channel blockers, digitalis and other drugs in general may also cause a slow heart rate, which is an effect needed for disease treatment and therefore is not a dangerous condition. However, when suffering from hypothyroidism, acute inferior wall myocardial infarction, intracranial disease, severe hypoxia and other diseases, it may lead to a slow heartbeat, which is a risk for such patients and prompt treatment is recommended. If you find that your heart rate is lower than normal when you measure it, there is no need to be too nervous. If you do not feel any other symptoms and no abnormalities are found after going to the hospital, it is considered normal.