Irregular rhythm?

  • A. W. G. J. OomenEmail author
  • F. F. J. Rozestraten
Open Access
Rhythm Puzzle – Question
An 84-year-old female presented with palpitations. Her cardiac medical history revealed persistent atrial fibrillation. The findings of a physical examination were normal. An electrocardiogram was recorded (Fig. 1). What is the rhythm and what is the mechanism for the varying conduction?
Fig. 1

Electrocardiogram at presentation


You will find the answer elsewhere in this issue.

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© The Author(s) 2019

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  1. 1.Department of CardiologyAmphia ZiekenhuisBredaThe Netherlands
  2. 2.Department of CardiologyCatharina ZiekenhuisEindhovenThe Netherlands

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