title: AV nodal reentrant tachycardia with a 2:1 right bundle branch block missed as bidirectional ventricular tachycardia in the first superficial evaluation.
abstract: A 95-year old woman was admitted to our emergency unit because of acute abdominal pain. After urgent surgery according to the acute abdomen, she was referred to intensive care unit (ICU) of the emergency unit as she was intubated. It was developed a run of new arrhythmia which was diagnosed by cardiology resident as bidirectional ventricular tachycardia due to beat to beat changing the axis of the QRS. However, a second and more precise evaluation of the abnormal ECG suggested a narrow supraventricular tachycardia, most probably AV nodal reentrant tachycardia with a 2:1 right bundle branch block.
authors.affiliation: Cardiovascular Research Center, Modarres Hospital, ShahidBeheshti University of Medical Sciences, Tehran, Iran (Islamic Republic of).
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Akbarzadeh
authors.affiliation: Cardiovascular Research Center, Modarres Hospital, ShahidBeheshti University of Medical Sciences, Tehran, Iran (Islamic Republic of).
authors.forename: Isa
authors.initials: I
authors.lastname: Khaheshi
authors.affiliation: Cardiovascular Research Center, Modarres Hospital, ShahidBeheshti University of Medical Sciences, Tehran, Iran (Islamic Republic of).
authors.forename: Mehdi
authors.initials: M
authors.lastname: Memaryan
authors.affiliation: Cardiovascular Research Center, ShahidBeheshti University of Medical Sciences, Tehran, Iran (Islamic Republic of).
authors.forename: Mohammad Parsa
authors.initials: MP
authors.lastname: Mahjoob
authors.affiliation: Non-Communicable Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran (Islamic Republic of). Students' Scientific Research Center (SSRC), Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Mohammadreza
authors.initials: M
authors.lastname: Naderian
mesh_terms: D000006:Abdomen, Acute / Q000601:surgery; D000369:Aged, 80 and over; D002037:Bundle-Branch Block / Q000175:diagnosis*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D013610:Tachycardia / Q000175:diagnosis*; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000175:diagnosis*; D013617:Tachycardia, Supraventricular / Q000175:diagnosis*
keywords: Atrioventricular nodal reentry tachycardia; Bidirectional ventricular tachycardia; Bundle branch block; Electrocardiogram; Supraventricular tachycardia