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Double fire tachycardia
  1. Haran Burri,
  2. Jacques Hoffmann,
  3. Marc Zimmermann
  1. Electrophysiology Unit, Hôpital de la Tour, Meyrin, Switzerland
  1. Correspondence to Dr Haran Burri, Hôpital de la Tour, Av. J-D, Maillard, 1217 Meyrin, Switzerland; haran.burri{at}

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A 69-year-old lady without any relevant medical history presented with recurrent palpitations. A 12-lead ECG was recorded and is shown in figure 1. The differential diagnosis of the narrow-complex tachycardia with a P:R ratio of 1:2 was (1) atrial …

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  • Ethics approval This is not a study. The patient gave her consent for publication (even though the report does not identify her).

  • Provenance and peer review Not commissioned; internally peer reviewed.