title: Narrow QRS tachycardia with changing R-P relationship.
authors.affiliation: Department of Medicine, National Yang-Ming University, School of Medicine, and the Veterans General Hospital-Taipei, Taiwan, ROC.
authors.forename: H M
authors.initials: HM
authors.lastname: Tsao
authors.forename: C T
authors.initials: CT
authors.lastname: Tai
authors.forename: C F
authors.initials: CF
authors.lastname: Tsai
authors.forename: S A
authors.initials: SA
authors.lastname: Chen
mesh_terms: D000328:Adult; D002036:Bundle of His / Q000503:physiopathology / Q000601:surgery; D017115:Catheter Ablation; D004562:Electrocardiography; D005260:Female; D006346:Heart Septum / Q000503:physiopathology / Q000601:surgery; D006801:Humans; D013612:Tachycardia, Ectopic Atrial / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D013614:Tachycardia, Paroxysmal / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery