What are the causes of sinus bradycardia?

The treatment of sinus bradycardia depends on the cause and severity of symptoms. Patients without obvious symptoms usually do not need treatment. Patients with symptoms need treatment according to specific conditions. Severe patients may need to install cardiac pacemakers. According to the above requirements, the answers are as follows: 1. What is the main requirement of the question? Give professional medical advice and preventive measures according to the cause of sinus bradycardia. 2. What are the core keywords? Sinus bradycardia, causes, medical advice, preventive measures.3. Answer: Sinus bradycardia is a common arrhythmia, which refers to the heart rate of adults less than 60 beats/min in quiet state. It is common in healthy young people, athletes and sleeping states. Other causes include intracranial disorders, severe hypoxia, hypothermia, hypothyroidism, obstructive jaundice, and sinus node pathologies, as well as cholinergic drugs, amiodarone, beta blockers, non-dihydropyridine calcium channel blockers, or digitalis. If drug-induced sinus bradycardia is present, the drug should be discontinued as much as possible. If disease-induced sinus bradycardia is present, treatment for the cause is required, such as correction of electrolyte imbalance, improvement of myocardial blood supply, etc.

For severe sinus bradycardia, such as heart rate less than 40 beats/min, or accompanied by obvious symptoms, such as dizziness, fatigue, amaurosis or even syncope, etc., need to install a cardiac pacemaker. 5. Key information: Sinus bradycardia treatment depends on the cause and severity of symptoms. Sinus bradycardia without symptoms usually does not need treatment, and sinus bradycardia with symptoms needs to be treated according to the specific situation. Severe sinus bradycardia may need to be installed cardiac pacemaker.