title: Unexpected rhythm regularity in a patient with atrial fibrillation and a changing frontal plane axis over time.
authors: Department of Cardiology, VU University Medical Center, Amsterdam, The Netherlands. a.zweerink@vumc.nl.
authors: A
authors: A
authors: Zweerink
authors: Department of Cardiology, VU University Medical Center, Amsterdam, The Netherlands.
authors: E
authors: E
authors: Leusveld
authors: Department of Cardiology, VU University Medical Center, Amsterdam, The Netherlands.
authors: C P
authors: CP
authors: Allaart
authors: Department of Cardiology, VU University Medical Center, Amsterdam, The Netherlands.
authors: M J B
authors: MJ
authors: Kemme