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[Clinical use of beta-blocker an as antiarrhythmic agent]
1Division of Cardiology, International Medical Center of Japan.
Insights
Beta-blocker treatment can prevent sudden cardiac death after heart attack and control arrhythmias. These drugs, like beta adrenoceptor blockers, are vital for managing conditions such as atrial fibrillation and ventricular tachyarrhythmias.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Beta-blocker treatment is associated with reduced sudden cardiac death post-myocardial infarction.
- Potential mechanisms include anti-ischemic and antiarrhythmic effects.
Abstract:
It has been reported that beta-blocker treatment reduces the incidence of sudden cardiac death after myocardial infarction, possibly due to antiischemic and antiarrhythmic effects. Beta adrenoceptor blocking drugs are administered, as an antiarrhythmic agent in patients with hyperthyroidism, atrial fibrillation, atrial flutter and ventricular tachyarrhythmias. Even low dose beta-blocker administration reduces the incidence of PVC's. Beta blockers are expected to decrease the ventricular rate of persistent tachyarrhythmias resulting from excessive cardiac sympathetic tone. Existence of denervated areas in myocardium in the cases of ventricular tachyarrhythmias may be shown in the cardiac scintigram as abnormal myocardial uptake of 123I-MIBG.