Arrhythmias & electrophysiology
Unipolar voltage electroanatomic mapping detects structural atrial remodeling identified by late gadolinium enhancement magnetic resonance imaging (LGE-MRI)
Authors' conclusion
Our findings demonstrate that unipolar LVAs strongly correlate with LGE regions.
Study context
- Population
- Patients scheduled for atrial fibrillation (AF) ablation undergoing preablation LGE-MRI and high-density electroanatomic mapping (EAM) in sinus rhythm
- Participants
- 20 patients
- Comparison
- Unipolar vs bipolar low-voltage areas for identifying LGE regions
- Outcome
- Correspondence between LGE areas and LVAs in the left atrial (LA) (confusion matrices, performance metrics)
Methodological detailsmultipolar high-density mapping, coregistration of EAM and LGE-MRI
- Multipolar high-density mapping
- Coregistration of EAM and LGE-MRI
Performance
As reported in the abstract
Identification of LGE areas
| Strategy | Sensitivity | Precision | F1 score | Accuracy |
|---|---|---|---|---|
| Unipolar low-voltage areas (LVAs) | 87.3% | 78.6% | 81.3% | 74.0% |
| Bipolar LVAs | 16.2% | 61.1% | 26.0% | 35.3% |
Sensitivity
Unipolar low-voltage areas (LVAs)87.3%
Bipolar LVAs16.2%
Precision
Unipolar low-voltage areas (LVAs)78.6%
Bipolar LVAs61.1%
F1 score
Unipolar low-voltage areas (LVAs)81.3%
Bipolar LVAs26.0%
Accuracy
Unipolar low-voltage areas (LVAs)74.0%
Bipolar LVAs35.3%
- LGE regions overlapping unipolar LVAs
- 87.3%
- LGE regions overlapping bipolar LVAs
- 16.2%
Original publication
Unipolar voltage electroanatomic mapping detects structural atrial remodeling identified by LGE-MRI. Heart Rhythm. Published 11 October 2024. doi:10.
Summarised from the published abstract; every number is checked against it