title: Atypical response of class IC atrial flutter to adenosine.
abstract: We report the case of a 67-year-old female with a wide QRS complex tachycardia at 180 bpm. A diagnosis of class IC atrial flutter with aberrant ventricular conduction caused by flecainide therapy was formulated. Intravenous adenosine administration resulted in adequate slowing of the ventricular rate and normalization of QRS complexes. Restoration of sinus rhythm was achieved with intravenous amiodarone. The response to adenosine confirmed the diagnosis of supraventricular tachycardia with aberrant conduction, but the transition from arrhythmia onset to restoration of sinus rhythm showed interesting peculiarities.
authors.affiliation: Department of Cardiology and Cardiovascular Surgery, "San Giuseppe Moscati" Hospital, Avellino, Italy. francesco.rotondi@tin.it
authors.forename: Francesco
authors.initials: F
authors.lastname: Rotondi
authors.forename: Tonino
authors.initials: T
authors.lastname: Lanzillo
authors.forename: Fiore
authors.initials: F
authors.lastname: Manganelli
authors.forename: Francesca
authors.initials: F
authors.lastname: Lanni
authors.forename: Ferdinando
authors.initials: F
authors.lastname: Alfano
authors.forename: Giovanni
authors.initials: G
authors.lastname: Stanco
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Rosato
mesh_terms: D000241:Adenosine / Q000009:adverse effects*; D000368:Aged; D000638:Amiodarone / Q000627:therapeutic use; D000889:Anti-Arrhythmia Agents / Q000009:adverse effects* / Q000627:therapeutic use; D001282:Atrial Flutter / Q000209:etiology*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D013617:Tachycardia, Supraventricular / Q000175:diagnosis
chemical_list: D000889:Anti-Arrhythmia Agents; D000241:Adenosine; D000638:Amiodarone