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KMID : 0378620030190000088
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Baptist Hospital Medical Journal
2003 Volume.19 No. 0 p.88 ~ p.92
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Wide QRS Tachycardia During Treatment with Class Ic Antiarrhythmic Agents in a Patient with Atrial Fibrillation
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심재광/Shim, Jae Kwang
이동일/김종현/Lee, Dong-Il/Kim Jong Hyun
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Abstract
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Wide QRS tacuycardia may represent a rare proarrhythmic: effect of some antiarhythmic agents. Class lc antiarrhythmic agents produce rate- dependent vertricular conduction slowing due to use-dependent sodium channel blockade , causing QRS prolongation in cases with an increased heart rate. The authors describe two cases of atrial flutter with 1 :1 atrioventricular conduction exhibiting a wide QRS tachycardia while on therapy using flecainide and propafenone, and the difficulty in interpreting the ECG.
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