Pre-procedural image-guided versus non-image-guided ventricular tachycardia ablation-a review
A A Hendriks1, Z Kis1, M Glisic2
1Department of Electrophysiology, Erasmus MC, University Medical Center, Rotterdam, The Netherlands.
Summary
Image-guided ventricular tachycardia (VT) ablation significantly improves VT-free and overall survival in patients with myocardial infarction (MI) compared to conventional methods. This advanced technique visualizes scar tissue, enhancing ablation success and long-term patient outcomes.
Area of Science:
- Cardiology
- Medical Imaging
- Interventional Electrophysiology
Background:
- Magnetic resonance imaging and computed tomography are crucial for differentiating scar tissue from healthy myocardium in patients experiencing ventricular tachycardia (VT) post-myocardial infarction (MI).
- Despite its diagnostic utility, the large-scale efficacy of image-guided VT ablation remains understudied.
Purpose of the Study:
- To conduct a meta-analysis comparing the long-term outcomes of image-guided VT ablation versus conventional ablation strategies in patients with VT following MI.
Main Methods:
- A comprehensive literature search was conducted across eight electronic databases for studies published between 2012 and 2018.
- Eligible studies included those detailing VT ablation outcomes in patients with an ischemic substrate, comparing image-guided techniques against conventional approaches.
- Data from 38 articles, encompassing 7748 patients, were included in the meta-analysis.
Main Results:
- VT-free survival was significantly higher in the image-guided VT ablation group (82%) compared to the conventional group (59%) (p < 0.001) over a mean follow-up of 35 months.
- Overall survival also demonstrated a significant advantage in the image-guided group (94%) versus the conventional group (82%) (p < 0.001).
- Five articles specifically reported outcomes for image-guided ablation procedures.
Conclusions:
- Image-guided VT ablation offers a significant survival benefit for patients with ischemic VT compared to conventional methods.
- The visualization of myocardial scar, both pre-procedurally and integrated during the procedure, is key to substrate-guided ablation and improved long-term results.
