Arrhythmias & electrophysiology
Feasibility study: Characterizing acute lesion dimensions in patients with and without devices using noncontrast (native T1-weighted) magnetic resonance imaging after ventricular tachycardia/premature ventricular complex radiofrequency ablation
Authors' conclusion
Native T1w MRI can effectively characterize lesion dimensions in patients with and without implantable cardioverter-defibrillators within 7 days after ablation.
Study context
- Population
- Patients with and without ICDs within 7 days of VT/PVC radiofrequency ablation (RFA)
- Participants
- 10 patients
- Comparison
- Native T1-weighted (T1w) magnetic resonance imaging (MRI) vs LGE MRI for RFA lesion dimensions
- Outcome
- Feasibility of wideband native T1w MRI in characterizing lesion dimensions
- Follow-up
- Within 7 days of RFA
Main finding
As reported in the abstract
- Mean microvascular obstruction (MVO) surface area greater than mean native T1w lesion surface area
- P = .0108
- Mean MVO volume greater than mean native T1w lesion volume
- P = .0376
- Correlation of average surface area, MVO vs native T1w
- r = 0.71, P = .0237
- Correlation of average volume, MVO vs native T1w
- r = 0.70, P = .0265
Further findings
Native T1w maximum lesion depth vs ablation parameters
- Correlation with average ablation duration
- r = 0.73, P = .02
- Correlation with average impedance drop
- r = 0.68, P = .04
Original publication
Feasibility study: Characterizing acute lesion dimensions in patients with and without devices using noncontrast (native T1-weighted) magnetic resonance imaging after ventricular tachycardia/premature ventricular complex radiofrequency ablation. Heart Rhythm. Published 20 June 2025. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →