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Sensing of atrial fibrillation by a dual chamber pacemaker: How should atrial sensing be programmed to ensure adequate mode shifting?
Linköping University, Faculty of Health Sciences. Linköping University, Department of Medicine and Care, Cardiology. Östergötlands Läns Landsting, Heart Centre, Department of Cardiology.
2000 (English)In: Pacing and Clinical Electrophysiology, ISSN 0147-8389, E-ISSN 1540-8159, Vol. 23, no 7, 1089-1093 p.Article in journal (Refereed) Published
Abstract [en]

Patients with atrial fibrillation and a DDDR pacemaker were studied to assess mode switching at different atrial sensitivity settings. Thirty-one patients were investigated 7 ▒ 9 months after pacemaker implantation and 20 of those patients were reinvestigated 23 ▒ 9 months after implant. Adequate mode switching was evaluated by stepwise programming the atrial sensitivity setting from maximal to minimal in the bipolar model. Adequate mode switching was observed in all 31 patients during the first evaluation. The lowermost sensitivity average allowing for mode switching was 1.1 ▒ 0.7 mV (range 0.3- 4.0 mV). A total of 22 (71%) patients demonstrated intermittent mode shifting at sensitivity settings above the atrial sensing threshold. In six (19%) patients, the adequate sensitivity threshold ranged from 0.3 to 0.5 mV, which did not allow for a two-fold sensitivity safety margin. During the second evaluation, adequate mode switching was achieved in all 20 patients, the lowermost sensitivity average allowing for mode switching being 1.1 ▒ 0.7 mV (range 0.3-2.0 mV). A total of 16 (80%) patients showed intermittent mode shifting at a sensitivity setting above the atrial sensing threshold. In five (25%) patients, the sensitivity threshold ranged from 0.3 to 0.5 mV, which did not allow for a two-fold sensitivity safety margin. Adequate mode switching was achieved in 31 of 31 patients in response to atrial fibrillation on one occasion and in all 20 patients on two occasions. It was necessary to program the atrial sensitivity to the highest possible level (0.3 mV) to ensured adequate mode switching in all cases.

Place, publisher, year, edition, pages
2000. Vol. 23, no 7, 1089-1093 p.
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-27191Local ID: 11840OAI: oai:DiVA.org:liu-27191DiVA: diva2:247742
Available from: 2009-10-08 Created: 2009-10-08 Last updated: 2017-12-13

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf