title: Narrow QRS tachycardia with long R-P.
abstract: Appropriate ECG diagnosis of a narrow complex tachycardia can be sometimes challenging. We present a case of palpitations and an electrocardiogram showing a long RP relationship. The ECG characteristics and the differential diagnosis and mechanisms documented during electrophysiology testing are discussed.
authors.forename: Carlos Sebastian
authors.initials: CS
authors.lastname: Ribas
authors.forename: Adrian
authors.initials: A
authors.lastname: Baranchuk
authors.forename: Stuart J
authors.initials: SJ
authors.lastname: Connolly
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Morillo
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004562:Electrocardiography / Q000379:methods*; D005260:Female; D006801:Humans; D013610:Tachycardia / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery