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Optimized multisite ventricular pacing in postoperative single-ventricle patients.

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Summary

Optimized multisite pacing after single-ventricle palliation is safe and feasible. This technique improved mean arterial pressure and fractional area shortening in pediatric patients, suggesting potential clinical benefits.

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Area of Science:

  • Pediatric Cardiology
  • Cardiovascular Surgery
  • Biomedical Engineering

Background:

  • Ventricular dyssynchrony is linked to poor outcomes in single-ventricle palliation.
  • Optimized temporary multisite pacing may mitigate these risks postoperatively.

Purpose of the Study:

  • To evaluate the safety, feasibility, and effectiveness of optimized temporary multisite pacing in children after single-ventricle palliation.
  • To assess the impact of different pacing configurations on hemodynamic and echocardiographic parameters.

Main Methods:

  • Seventeen pediatric patients underwent single-ventricle palliation with placement of atrial and ventricular pacing leads.
  • Pacing parameters were optimized in the intensive care unit to maximize mean arterial pressure (MAP).
  • Comparisons included bipolar, unipolar, single-site atrioventricular pacing, and intrinsic rhythm, with patients serving as their own controls.

Main Results:

  • Multisite pacing significantly increased MAP compared to intrinsic rhythm (bipolar: +2.2%, unipolar: +2.8%).
  • Unipolar pacing also led to a significant increase in echocardiographic fractional area change (32% to 36%).
  • No adverse events related to the pacing protocol were reported.

Conclusions:

  • Optimized multisite pacing is a safe and feasible intervention in the early postoperative period following single-ventricle palliation.
  • The technique demonstrates potential for improving hemodynamic function and cardiac performance.
  • Further research is warranted to confirm long-term clinical benefits.