title: Case images: PR interval prolongation induced by ventricular extrasystole: an interesting electrocardiogram.
authors.affiliation: Department of Cardiology, Kartal Koşuyolu Yüksek İhtisas Training and Research Hospital, İstanbul, Turkey.
authors.forename: Arzu
authors.initials: A
authors.lastname: Kalaycı
authors.affiliation: Department of Cardiology, Kartal Koşuyolu Yüksek İhtisas Training and Research Hospital, İstanbul, Turkey.
authors.forename: Taylan
authors.initials: T
authors.lastname: Akgun
authors.affiliation: Department of Cardiology, Kartal Koşuyolu Yüksek İhtisas Training and Research Hospital, İstanbul, Turkey.
authors.forename: Can Yucel
authors.initials: CY
authors.lastname: Karabay
authors.affiliation: Department of Cardiology, Kartal Koşuyolu Yüksek İhtisas Training and Research Hospital, İstanbul, Turkey.
authors.forename: Cevat
authors.initials: C
authors.lastname: Kırma
mesh_terms: D000328:Adult; D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000503:physiopathology; D003937:Diagnosis, Differential; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D018670:Monitoring, Ambulatory