Sinus bradycardia is a type of arrhythmia in which the normal adult heart rate is between 60 and 100 beats per minute, and if it is lower than 60, it is called bradycardia. Sinus bradycardia is more dangerous and can cause dizziness and memory loss, and may lead to weakness of the limbs. The dangers of sinus bradycardia are as follows: 1, dizziness and blurred vision Sinus bradycardia is a symptom that affects the blood supply function of our body, after the problem of blood supply function, it will cause dizziness and blurred vision, especially in the elderly is very common. 2, aggravate heart disease, especially heart disease patients, is often sinus bradycardia phenomenon, frequent occurrence of this phenomenon will aggravate heart disease, and may cause other cardiac conditions, such as increased heart pressure and cause angina symptoms. 3, affect memory Sinus bradycardia can also seriously affect the human memory and intelligence, easily affecting the health of the brain, and may cause Alzheimer’s disease. 4, weakness of limbs Weakness of limbs is also a very significant danger of sinus bradycardia, affecting the normal life and work of the human body. The symptoms of sinus bradycardia are very detrimental to our health, and may cause and aggravate heart disease, as well as dizziness and dizziness, and also affect the memory of the human body.