Netherlands Heart Journal, Mar 2018

R. van der Nagel, V. F. van Dijk

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Criss-cross R. van der Nagel 0 V. F. van Dijk 0 0 St. Antonius Ziekenhuis , Nieuwegein , The Netherlands - A 50-year-old male patient of Eastern European origin was admitted to our clinic for aortic valve replacement surgery because of severe stenosis of a bicuspid aortic valve. Recently he had been diagnosed with a third degree atrioventricular block, for which a dual-chamber pacemaker (Medtronic Advisa DR MRI A3DR01) was implanted at our clinic. After aortic valve replacement surgery, the device was routinely interrogated. In the Quick Look screen, multiple episodes of atrial tachycardia/atrial fibrillation were annotated. All episodes resembled the recording/dot blot in Fig. 1. What is the explanation of the peculiar pattern? Answer You will find the answer elsewhere in this issue. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://, 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.

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R. van der Nagel, V. F. van Dijk. Criss-cross, Netherlands Heart Journal, 2018, 1-1, DOI: 10.1007/s12471-018-1101-9