title: A narrow complex tachycardia with varying RP intervals: What is the mechanism?
authors: Department of Medicine, Division of Cardiology, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania. Electronic address: reginald.ho@jefferson.edu.
authors: Reginald T
authors: RT
authors: Ho
authors: Department of Medicine, Division of Cardiology, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania.
authors: Shadi
authors: S
authors: Idris
authors: Department of Medicine, Division of Cardiology, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania.
authors: Nikhil
authors: N
authors: Joshi
authors: Department of Medicine, Division of Cardiology, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania.
authors: Praveen
authors: P
authors: Mehrotra
mesh_terms: D003937:Diagnosis, Differential; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008875:Middle Aged; D013610:Tachycardia / Q000145:classification / Q000175:diagnosis* / Q000503:physiopathology; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000175:diagnosis; D013613:Tachycardia, Ectopic Junctional / Q000175:diagnosis; D013617:Tachycardia, Supraventricular / Q000175:diagnosis
keywords: Atrial tachycardia; Atrioventricular nodal reentrant tachycardia; Entrainment; Junctional tachycardia