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Validation of an automated premature ventricular contraction mapping algorithm.

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Summary

An automated algorithm for premature ventricular contractions (PVCs) mapping improves procedural efficiency by accurately annotating local activation time (LAT) during catheter ablation. This method reduces radiofrequency time and PVC offset compared to conventional techniques.

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Area of Science:

  • Cardiovascular Electrophysiology
  • Medical Device Technology

Background:

  • Accurate local activation time (LAT) annotation is crucial for catheter mapping and ablation of premature ventricular contractions (PVCs).
  • Catheter position shifts between sinus rhythm (SR) and PVCs complicate 3D mapping and manual LAT annotation.
  • Automated LAT annotation algorithms offer a potential solution to improve accuracy and efficiency.

Purpose of the Study:

  • To evaluate the efficacy of an automated algorithm for LAT annotation in PVC mapping.
  • To compare the procedural efficiency and accuracy of the LAT-hybrid™ module with conventional mapping methods.

Main Methods:

  • A retrospective study of 64 patients undergoing PVC catheter ablation.
  • Patients were divided into two groups: those using CARTO 3 version 7 with the LAT-hybrid™ module (hybrid group) and those using CARTO 3 version 6 without the module (conventional group).

Main Results:

  • The automated algorithm demonstrated a mean hybrid distance of 4.03 ± 2.33 mm, comparable to manual correction accuracy.
  • The hybrid group showed significantly shorter radiofrequency (RF) ablation time and PVC offset compared to the conventional group.
  • The LAT-hybrid™ module enabled more detailed mapping without compromising accuracy.

Conclusions:

  • The LAT-hybrid™ module provides accurate and detailed PVC mapping using an automated LAT annotation algorithm.
  • This automated approach significantly reduces RF time and PVC offset, particularly in left ventricular outflow tract (LVOT) cases.
  • Automated LAT annotation enhances procedural efficiency in catheter ablation for PVCs.