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Related Experiment Videos

Mapping for ventricular tachycardia.

Sanjay Dixit1, David J Callans

  • 1Section of Cardiac Electrophysiology, Hospital of The University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.

Cardiac Electrophysiology Review
|November 20, 2002
PubMed
Summary
This summary is machine-generated.

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Mapping strategies for ventricular tachycardia (VT) have advanced, utilizing electrocardiograms (ECG) and activation mapping for precise localization. Techniques like pace-mapping and entrainment mapping are crucial for successful VT ablation, especially in structural heart disease.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Technology

Background:

  • Ventricular tachycardia (VT) mapping strategies have significantly evolved over the past two decades.
  • Electrocardiogram (ECG) analysis and activation mapping are foundational techniques for VT localization.
  • The morphology of VT on ECG can be influenced by cardiac orientation and scar location.

Purpose of the Study:

  • To review and discuss advanced mapping techniques for successful ventricular tachycardia ablation.
  • To highlight the role of various mapping modalities in identifying VT origins and circuits.
  • To address persistent challenges in VT ablation, particularly in patients with structural heart disease.

Main Methods:

  • Review of current literature on VT mapping and ablation techniques.

Related Experiment Videos

  • Discussion of electrocardiogram (ECG) interpretation, activation mapping, and pace-mapping.
  • Analysis of entrainment mapping as a gold standard for reentrant VT circuit identification.
  • Consideration of 3D mapping systems and emerging technologies like epicardial mapping.

    • Main Results:

    • ECG and activation mapping aid in identifying VT origin, but scar location can alter morphology.
    • Pace-mapping is effective for identifying ablation sites, requiring a 12-lead ECG match.
    • Entrainment mapping is highly successful (60-90%) for reentrant VT in hemodynamically stable patients.
    • Despite advances, 10-20% of VTs remain challenging to ablate, especially with structural heart disease.

    Conclusions:

    • Advanced mapping techniques, including ECG, activation, and entrainment mapping, are vital for VT ablation success.
    • Newer technologies like 3D mapping and epicardial mapping show promise for improving outcomes in complex VT cases.
    • Continued innovation in mapping and ablation technologies is necessary to address refractory VT, particularly in patients with structural heart disease.