What is the cause of sinus bradycardia and how to treat it?

Condition analysis: Sinus bradycardia is called when sinus rhythm is lower than 60 beats per minute. It can be seen that healthy adults, especially athletes, the elderly and sleep. Other causes include increased intracranial pressure, hyperkalemia, hypothyroidism, hypothermia and the use of digitalis, beta blockers, reserpine, guanethidine, methyldopa and other drugs. In organic heart disease, sinus bradycardia can be seen. Suggestion: 1. All patients with sinus bradycardia should pay attention to finding the cause. Most sinus bradycardia have no important clinical significance and do not need treatment. 2. In patients with organic heart disease (especially acute myocardial infarction), the slow heart rate can obviously reduce the cardiac output and affect the blood supply of important organs such as heart, brain and kidney, with obvious symptoms. At this time, atropine should be used (by injection or oral administration), or even isoproterenol can be used for intravenous drip (1mg is added to 500 ml of 5% glucose solution for slow intravenous drip, and the dose is adjusted according to the heart rate). You can also take aminophylline 0. 1g orally, three times a day. 3. For patients with severe sinus bradycardia caused by impaired sinus node function, the heart rate is very slow, the symptoms are obvious, and even syncope occurs, and the drug treatment effect is not good. It is necessary to install a permanent artificial pacemaker to prevent sinus arrest. 4. For organic heart disease with sinus bradycardia, sinus arrest or persistent recurrent sinus block without escape rhythm, syncope or Asperger's syndrome, and the drug treatment is ineffective, a permanent artificial pacemaker should be installed. 5. Sinus bradycardia caused by increased intracranial pressure, drugs, bile duct obstruction and injury. Should be treated first, combined with the degree of heart rate slowdown and whether it causes a decrease in cardiac output. Proper use of drugs to improve heart rate.