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Transient bradycardia during Micra AV2 setup can trigger torsades de pointes, a dangerous heart rhythm. This case highlights the proarrhythmic risk of automated device initialization, suggesting individualized programming for high-risk patients with QT prolongation.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Device Technology

Background:

  • The Micra AV2 is a leadless pacemaker.
  • Automated device initialization processes may carry unforeseen risks.
  • QT prolongation is a known risk factor for cardiac arrhythmias.

Purpose of the Study:

  • To report a case of torsades de pointes (TdP) during Micra AV2 setup.
  • To highlight the potential proarrhythmic risk associated with automated pacemaker initialization.
  • To suggest the need for individualized programming in specific patient populations.

Main Methods:

  • Case report detailing an adverse event during pacemaker implantation.
  • Review of patient history and device programming parameters.
  • Analysis of the electrophysiological event and its correlation with device function.

Main Results:

  • A patient experienced torsades de pointes triggered by transient bradycardia.
  • The event occurred during the automated initialization phase of the Micra AV2 pacemaker.
  • The patient had pre-existing QT prolongation, a potential risk factor.

Conclusions:

  • Automated initialization of the Micra AV2 pacemaker carries a potential proarrhythmic risk.
  • Transient bradycardia can precipitate life-threatening arrhythmias like TdP in susceptible patients.
  • Individualized programming and careful monitoring are crucial for high-risk patients, especially those with QT prolongation.