Whether a heart rate of 50-60 beats/min is dangerous cannot be generalized because there are many factors affecting the heart rate and should be analyzed comprehensively. On the one hand, it depends on whether the patient’s heart rate is generated by the sinus node, on the other hand, it depends on whether the frequency of the patient’s heart beat is regular, combined with the patient’s clinical symptoms and the underlying causes that induce a slow heart rate for a comprehensive judgment. I. Not dangerous: Patients with sinus bradycardia, whose heart rate fluctuates at 50-60 beats/min, usually do not cause severe cardiac and cerebral blood supply deficiency, and patients mostly have no clinical symptoms, mostly seen in athletes or elderly people. For drug-induced low heart rate, if there are no other symptoms, such as dizziness, shortness of breath, etc., the heart rate can recover on its own after stopping the drug. Second, there are dangers: 1, ectopic heart rate: the patient’s heart rate slows down and does not originate from the sinus node, but from other ectopic pacing points, such as the patient has sinus arrest, 50-60 beats/min heart rate from the atrial or ventricular parts, which may lead to progressive slowing of the patient’s heart rate, more dangerous; 2, atrioventricular block: severe atrioventricular block, such as second-degree type II atrioventricular block or third degree AV block, patients may also experience progressive slowing of heart rate, which is also more dangerous; 3, cardiogenic diseases: patients with slow heart rate, induced by serious cardiogenic diseases, can also be very dangerous, such as clinically common diseases that can induce bradycardia are acute myocardial infarction, acute myocarditis or acute infective endocarditis and other diseases, which may This can lead to malignant arrhythmia or cardiogenic shock within a short period of time, which can endanger the patient’s life and is a relatively dangerous situation. When bradycardia is accompanied by chest tightness and shortness of breath, dizziness, and precordial pain, patients should go to the hospital as soon as possible to confirm the diagnosis and give targeted treatment.