Challenges to Contemporary Wide Complex Tachycardia Criteria: A Single-center Case Series of 1:1 Atrial Flutter

Figures

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  Figure 1:. Case 1 electrocardiograms. A: Baseline conduction disease with left bundle branch block and first-degree atrioventricular block prior to clinical presentation. B: Atrial flutter with 1:1 aberrant conduction at the time of presentation.

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  Figure 2:. Case 3 electrocardiograms. A: Typical atrial flutter with 1:1 atrioventricular conduction with a ventricular response rate of 224 bpm and a QRS duration of 188 ms. B: Typical atrial flutter with variable atrioventricular block with the initiation of intravenous amiodarone. Narrowing of the QRS complex was noted with slowing of the ventricular response rate.