Indian Pacing and Electrophysiology Journal (Jan 2021)

AAI to DDD pacing mode inappropriate switches in a dual chamber pacemaker due to ventricular blanking period

  • Maria Cristina Lanzilotti,
  • Giovanni Milanese

Journal volume & issue
Vol. 21, no. 1
pp. 48 – 50

Abstract

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A 90-year-old woman received a dual chamber pacemaker (PM) for a sick sinus syndrome. The PM was programmed with SafeR AAI-DD pacing mode at 60 bpm. During a standard follow up, some memorized electrograms (EGMs) were found in SafeR diagnostics, with atrial pacing (Ap) not followed by any ventricular sensing/pacing event, due to simultaneous junctional activity falling into ventricular blanking period during Ap and, for this reason, unsensed by the PM. Blanking periods can affect PM functioning if not revealed and adjusted.

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