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09-06-2016 | Rhythm Puzzle Question | Uitgave 7-8/2016 Open Access

Netherlands Heart Journal 7-8/2016

Temporary severe bradycardia due to pacemaker programming

Tijdschrift:
Netherlands Heart Journal > Uitgave 7-8/2016
Auteurs:
A. Böhm, R. G. Kiss, P. Bogyi, G. Z. Duray
A 67-year-old male patient received a pacemaker for syncope. His parameters at check-up were: P/R amplitude 2.8/11 mV and atrial/ventricular threshold 0.875/0.625. The pacemaker was programmed as follows: lower rate 60 bpm; upper tracking rate 130 bpm; sensed AV interval 120 ms; paced AV interval 50 ms; atrial/ventricular sensitivity 0.5/5.6 mV, and atrial/ventricular output 2/2 V. Due to syncope in his history, the rate drop response was also activated: drop size 25 bpm; drop rate 50 bpm; detection beats: 2 beats. Both with an intervention rate of 100 bpm.
The following ECG was recorded during carotid massage (Fig.  1). What is the explanation for this interesting ECG recording?

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://​creativecommons.​org/​licenses/​by/​4.​0/​), 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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Netherlands Heart Journal

Het Netherlands Heart Journal wordt uitgegeven in samenwerking met de Nederlandse Vereniging voor Cardiologie en de Nederlandse Hartstichting. Het tijdschrift is Engelstalig en wordt gratis beschikbaa ...

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