Atrial flutter with 1:1 atrioventricular conduction caused by propafenone |
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Authors: | MB el-Harari PC Adams |
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Affiliation: | Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom. |
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Abstract: | We describe a case of 1:1 atrial flutter in a patient with coronary disease taking propafenone. In atrial flutter, the atrial rate is usually about 300 beats/min with 2:1 AV conduction and a ventricular rate of 150 beats/min. Class IA antiarrhythmic drugs, especially quinidine and disopyramide, may cause 1:1 AV response because they reduce atrial rate and are vagolytic. However, propafenone is a Class IC agent and has no anticholinergic properties, and the occurrence of 1:1 AV conduction at a rate of about 250 beats/min is an important side effect that, although uncommon, should be recognized. |
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