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  • Title: Pharmacologic therapy of atrial flutter.
    Author: Campbell RW.
    Journal: J Cardiovasc Electrophysiol; 1996 Oct; 7(10):1008-12. PubMed ID: 8894943.
    Abstract:
    Atrial flutter is a relatively rare but nonetheless important arrhythmia. Its mechanism and anatomy have been defined as right atrial macroreentry. It responds to treatment with a variety of antiarrhythmic agents but, in general, drug efficacy for acute termination is low. The addition of pacing to drug therapy markedly improves the success rate for restoration of sinus rhythm. Useful antiarrhythmic agents include amiodarone, sotalol, disopyramide, flecainide, and propafenone, but definitive efficacy studies have not been performed. The risk of provoking 1:1 AV conduction and a marked increase in ventricular response rate is always present. AV nodal blocking drugs (digoxin and verapamil) probably offer protection from this unwanted effect, but the prevalence of 1:1 conduction and the efficacy of AV nodal blockade remain to be established. When drug management fails, there is a place for radiofrequency ablation. Little is known about the thromboembolic risk of atrial flutter. As a consequence, the role of prophylactic anticoagulation is uncertain. Current interest in atrial flutter will ensure that these and other clinical questions are answered in the near future.
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